{"id":14261,"date":"2025-06-07T12:09:32","date_gmt":"2025-06-07T05:09:32","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=14261"},"modified":"2025-07-04T11:30:05","modified_gmt":"2025-07-04T04:30:05","slug":"tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/","title":{"rendered":"[T\u1ed4NG H\u1ee2P] Di\u1ec7n t\u00edch l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch c\u00e1c h\u00ecnh nh\u01b0 th\u1ebf n\u00e0o?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Dinh_nghia_dien_tich_la_gi\" >\u0110\u1ecbnh ngh\u0129a di\u1ec7n t\u00edch l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Cach_tinh_dien_tich_hinh_tam_giac\" >C\u00e1ch t\u00ednh di\u1ec7n t\u00edch h\u00ecnh tam gi\u00e1c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Cach_tinh_dien_tich_cac_hinh_khoi_4_canh\" >C\u00e1ch t\u00ednh di\u1ec7n t\u00edch c\u00e1c h\u00ecnh kh\u1ed1i 4 c\u1ea1nh<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Cong_thuc_tinh_dien_tich_hinh_chu_nhat\" >C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Cong_thuc_tinh_dien_tich_hinh_binh_hanh\" >C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Cong_thuc_tinh_dien_tich_hinh_thang\" >C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh thang<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Cong_thuc_tinh_dien_tich_hinh_vuong\" >C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Cong_thuc_tinh_dien_tich_hinh_thoi\" >C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh thoi<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Cach_tinh_dien_tich_hinh_tron\" >C\u00e1ch t\u00ednh di\u1ec7n t\u00edch h\u00ecnh tr\u00f2n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Cac_dang_toan_ve_dien_tich_thuong_gap_nhat\" >C\u00e1c d\u1ea1ng to\u00e1n v\u1ec1 di\u1ec7n t\u00edch th\u01b0\u1eddng g\u1eb7p nh\u1ea5t<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Doc_va_viet_don_vi_dien_tich\" >\u0110\u1ecdc v\u00e0 vi\u1ebft \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Quy_doi_cac_don_vi_dien_tich\" >Quy \u0111\u1ed5i c\u00e1c \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Tinh_dien_tich_voi_cac_yeu_to_cho_truoc\" >T\u00ednh di\u1ec7n t\u00edch v\u1edbi c\u00e1c y\u1ebfu t\u1ed1 cho tr\u01b0\u1edbc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Cho_biet_dien_tich_tim_cac_yeu_to_con_lai\" >Cho bi\u1ebft di\u1ec7n t\u00edch t\u00ecm c\u00e1c y\u1ebfu t\u1ed1 c\u00f2n l\u1ea1i<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#So_sanh_dien_tich_cac_hinh_cho_truoc\" >So s\u00e1nh di\u1ec7n t\u00edch c\u00e1c h\u00ecnh cho tr\u01b0\u1edbc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Ket_hop_dien_tich_voi_cac_khai_niem_khac_nhu_chu_vi_the_tich\" >K\u1ebft h\u1ee3p di\u1ec7n t\u00edch v\u1edbi c\u00e1c kh\u00e1i ni\u1ec7m kh\u00e1c nh\u01b0 chu vi, th\u1ec3 t\u00edch<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Bai_toan_ung_dung_dien_tich_trong_doi_song_hang_ngay\" >B\u00e0i to\u00e1n \u1ee9ng d\u1ee5ng di\u1ec7n t\u00edch trong \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Dien_tich_trong_bai_toan_thuc_te\" >Di\u1ec7n t\u00edch trong b\u00e0i to\u00e1n th\u1ef1c t\u1ebf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.ckconitsha.com\/vn\/tong-hop-dien-tich-la-gi-cong-thuc-tinh-dien-tich-cac-hinh-nhu-the-nao\/#Ung_dung_dien_tich_trong_linh_vuc_khac_nhau\" >\u1ee8ng d\u1ee5ng di\u1ec7n t\u00edch trong l\u0129nh v\u1ef1c kh\u00e1c nhau<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>Di\u1ec7n t\u00edch l\u00e0 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n trong h\u00ecnh h\u1ecdc v\u00e0 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng nhi\u1ec1u trong th\u1ef1c ti\u1ec5n. Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd c\u00f9ng c\u00e1c b\u1ea1n t\u1ed5ng h\u1ee3p l\u1ea1i c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch c\u00e1c h\u00ecnh ph\u1eb3ng \u0111\u01a1n gi\u1ea3n trong b\u00e0i vi\u1ebft n\u00e0y!<\/p>\n<p>                        View all<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dinh_nghia_dien_tich_la_gi\"><\/span>\u0110\u1ecbnh ngh\u0129a di\u1ec7n t\u00edch l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch c\u1ee7a 1 h\u00ecnh l\u00e0 \u0111\u1ea1i l\u01b0\u1ee3ng bi\u1ec3u th\u1ecb ph\u1ea1m vi c\u1ee7a 1 h\u00ecnh tr\u00ean m\u1eb7t ph\u1eb3ng ho\u1eb7c 1 kh\u1ed1i h\u00ecnh trong kh\u00f4ng gian. Di\u1ec7n t\u00edch bao g\u1ed3m to\u00e0n b\u1ed9 ph\u1ea7n m\u1eb7t ph\u1eb3ng n\u1eb1m trong h\u00ecnh \u0111\u00f3.\u00a0<\/p>\n<p dir=\"ltr\">Trong H\u1ec7 th\u1ed1ng \u0111\u01a1n v\u1ecb qu\u1ed1c t\u1ebf (SI), \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch ti\u00eau chu\u1ea9n l\u00e0 m\u00e9t vu\u00f4ng (vi\u1ebft t\u1eaft l\u00e0 m\u00b2).<\/p>\n<p dir=\"ltr\">Ngo\u00e0i \u0111\u01a1n v\u1ecb (m\u00b2), di\u1ec7n t\u00edch c\u00f2n c\u00f3 th\u1ec3 quy \u0111\u1ed5i th\u00e0nh kilomet vu\u00f4ng, centimet vu\u00f4ng,&#8230; nh\u01b0 sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1 km vu\u00f4ng = 1.000.000 m\u00e9t vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1 m\u00e9t vu\u00f4ng = 10.000 cm vu\u00f4ng = 1.000.000 mm vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1 cm vu\u00f4ng = 100 mm vu\u00f4ng.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 h\u00ecnh \u1ea3nh m\u00f4 ph\u1ecfng di\u1ec7n t\u00edch c\u00e1c h\u00ecnh tr\u00ean m\u1eb7t ph\u1eb3ng:<\/p>\n<p dir=\"ltr\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cach_tinh_dien_tich_hinh_tam_giac\"><\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch h\u00ecnh tam gi\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">H\u00ecnh tam gi\u00e1c l\u00e0 m\u1ed9t lo\u1ea1i h\u00ecnh c\u01a1 b\u1ea3n trong h\u00ecnh h\u1ecdc, c\u00f3 ba \u0111\u1ec9nh l\u00e0 ba \u0111i\u1ec3m kh\u00f4ng th\u1eb3ng h\u00e0ng v\u00e0 ba c\u1ea1nh l\u00e0 ba \u0111o\u1ea1n th\u1eb3ng n\u1ed1i c\u00e1c \u0111\u1ec9nh v\u1edbi nhau. \u0110\u1eb7c tr\u01b0ng quan tr\u1ecdng c\u1ee7a tam gi\u00e1c l\u00e0 t\u1ed5ng ba g\u00f3c trong m\u1ed9t tam gi\u00e1c ph\u1ea3i lu\u00f4n b\u1eb1ng 180 \u0111\u1ed9. K\u00ed hi\u1ec7u: \u0394ABC.\u00a0<\/p>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng t\u1ed5ng h\u1ee3p c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch tam gi\u00e1c:<\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fff4f5;margin-left: auto;margin-right: auto\">\n<tr>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">D\u1ea1ng h\u00ecnh tam gi\u00e1c<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c di\u1ec7n t\u00edch (S)<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">Ghi ch\u00fa<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">Tam gi\u00e1c nh\u1ecdn<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-2.jpg\" alt=\"\" width=\"253\" height=\"176\"><\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">S = (a x h)\/2<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">a: \u0111\u1ed9 d\u00e0i c\u1ea1nh \u0111\u00e1y<\/p>\n<p dir=\"ltr\">h: chi\u1ec1u cao<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">Tam gi\u00e1c c\u00e2n<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-3.jpg\" alt=\"\" width=\"200\" height=\"96\"><\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">S = (a x h)\/ 2<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">a: chi\u1ec1u d\u00e0i \u0111\u00e1y tam gi\u00e1c c\u00e2n (c\u1ea1nh d\u00e0i nh\u1ea5t c\u1ee7a tam gi\u00e1c)<\/p>\n<p dir=\"ltr\">h: chi\u1ec1u cao c\u1ee7a tam gi\u00e1c<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">Tam gi\u00e1c \u0111\u1ec1u<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-4.jpg\" alt=\"\" width=\"200\" height=\"136\"><\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">S = (a x h)\/ 2<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">a: chi\u1ec1u d\u00e0i \u0111\u00e1y tam gi\u00e1c \u0111\u1ec1u ((\u0111\u00e1y l\u00e0 m\u1ed9t trong 3 c\u1ea1nh c\u1ee7a tam gi\u00e1c)<\/p>\n<p dir=\"ltr\">h: chi\u1ec1u cao c\u1ee7a tam gi\u00e1c<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">Tam gi\u00e1c vu\u00f4ng<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-5.jpg\" alt=\"\" width=\"200\" height=\"99\"><\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">S = (a x h)\/ 2<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">a: c\u1ea1nh g\u00f3c vu\u00f4ng d\u00e0i<\/p>\n<p dir=\"ltr\">h: c\u1ea1nh g\u00f3c vu\u00f4ng ng\u1eafn<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">Tam gi\u00e1c vu\u00f4ng c\u00e2n<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-6.jpg\" alt=\"\" width=\"200\" height=\"97\"><\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">S = 1\/2 x a^2<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">a: chi\u1ec1u cao c\u1ee7a tam gi\u00e1c<\/p>\n<p dir=\"ltr\">h: chi\u1ec1u cao tam gi\u00e1c\u00a0<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">Tam gi\u00e1c t\u00f9<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-7.png\" alt=\"\" width=\"200\" height=\"162\"><\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">S = (a x h)\/ 2<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">BC = a: chi\u1ec1u d\u00e0i c\u1ea1nh \u0111\u00e1y\u00a0<\/p>\n<p dir=\"ltr\">AH = h: chi\u1ec1u cao c\u1ee7a tam gi\u00e1c t\u00f9<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">Chi ti\u1ebft c\u00e1ch t\u00ednh di\u1ec7n t\u00edch tam gi\u00e1c: \u00a0Di\u1ec7n t\u00edch h\u00ecnh tam gi\u00e1c v\u00e0 b\u00ed quy\u1ebft gi\u00fap em h\u1ecdc \u0111\u01a1n gi\u1ea3n d\u1ec5 hi\u1ec3u h\u01a1n<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cach_tinh_dien_tich_cac_hinh_khoi_4_canh\"><\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch c\u00e1c h\u00ecnh kh\u1ed1i 4 c\u1ea1nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">H\u00ecnh kh\u1ed1i c\u00f3 4 c\u1ea1nh g\u1ed3m 5 lo\u1ea1i: H\u00ecnh ch\u1eef nh\u1eadt, h\u00ecnh b\u00ecnh h\u00e0nh, h\u00ecnh thang &amp; h\u00ecnh vu\u00f4ng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch t\u00ednh chi ti\u1ebft cho m\u1ed7i h\u00ecnh.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_dien_tich_hinh_chu_nhat\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">H\u00ecnh ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c hi\u1ec3u m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n l\u00e0 m\u1ed9t h\u00ecnh t\u1ee9 gi\u00e1c c\u00f3 4 g\u00f3c vu\u00f4ng, hay l\u00e0 m\u1ed9t h\u00ecnh b\u00ecnh h\u00e0nh \u0111\u1eb7c bi\u1ec7t.<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-8.png\" alt=\"H\u00ecnh ch\u1eef nh\u1eadt trong h\u00ecnh h\u1ecdc. (\u1ea2nh: Internet)\" width=\"800\" height=\"582\"><\/p>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 ph\u1ea7n \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng \u0111\u1ed9 l\u1edbn b\u1ec1 m\u1eb7t c\u1ee7a h\u00ecnh, l\u00e0 ph\u1ea7n m\u1eb7t ph\u1eb3ng m\u00e0 ta c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y. V\u1eady n\u00ean, \u0111\u1ec3 t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh ta s\u1ebd l\u1ea5y chi\u1ec1u d\u00e0i nh\u00e2n v\u1edbi chi\u1ec1u r\u1ed9ng.<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">S = a x b<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:\u00a0<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S l\u00e0 di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a l\u00e0 chi\u1ec1u d\u00e0i h\u00ecnh ch\u1eef nh\u1eadt<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">b l\u00e0 chi\u1ec1u r\u1ed9ng h\u00ecnh ch\u1eef nh\u1eadt<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">https:\/\/www.ckconitsha.com\/vn\/ba-me-can-biet\/giao-duc\/kien-thuc-co-ban\/dien-tich-hinh-chu-nhat\u00a0<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_dien_tich_hinh_binh_hanh\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">H\u00ecnh b\u00ecnh h\u00e0nh l\u1edbp 4 \u0111\u01b0\u1ee3c hi\u1ec3u m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n l\u00e0 h\u00ecnh t\u1ee9 gi\u00e1c c\u00f3 c\u00e1c c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song v\u00e0 b\u1eb1ng nhau.<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-9.jpg\" alt=\"H\u00ecnh b\u00ecnh h\u00e0nh trong h\u00ecnh h\u1ecdc. (\u1ea2nh: Internet) \" width=\"800\" height=\"450\"><\/p>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh b\u1eb1ng \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng \u0111\u1ed9 l\u1edbn c\u1ee7a b\u1ec1 m\u1eb7t h\u00ecnh, ch\u00ednh l\u00e0 ph\u1ea7n m\u1eb7t ph\u1eb3ng m\u00e0 m\u1ecdi ng\u01b0\u1eddi nh\u00ecn th\u1ea5y b\u00ean ngo\u00e0i. C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh s\u1ebd b\u1eb1ng t\u00edch c\u1ee7a c\u1ea1nh \u0111\u00e1y nh\u00e2n v\u1edbi chi\u1ec1u cao.<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">S = a.h<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S l\u00e0 di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a l\u00e0 c\u1ea1nh \u0111\u00e1y c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">h l\u00e0 chi\u1ec1u cao, n\u1ed1i t\u1eeb \u0111\u1ec9nh t\u1edbi \u0111\u00e1y c\u1ee7a m\u1ed9t h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">Chi ti\u1ebft di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh: L\u00fd thuy\u1ebft v\u00e0 b\u00e0i t\u1eadp h\u00ecnh b\u00ecnh h\u00e0nh l\u1edbp 4 (t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao)\u00a0<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_dien_tich_hinh_thang\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh thang<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">H\u00ecnh thang l\u00e0 m\u1ed9t t\u1ee9 gi\u00e1c l\u1ed3i v\u1edbi 2 c\u1ea1nh \u0111\u1ed1i song song ch\u00ednh l\u00e0 c\u00e1c c\u1ea1nh \u0111\u00e1y, c\u00f2n 2 c\u1ea1nh c\u00f2n l\u1ea1i l\u00e0 2 c\u1ea1nh b\u00ean. H\u00ecnh thang g\u1ed3m 4 d\u1ea1ng:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh thang vu\u00f4ng l\u00e0 h\u00ecnh thang c\u00f3 m\u1ed9t g\u00f3c vu\u00f4ng.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh thang c\u00e2n l\u00e0 h\u00ecnh thang c\u00f3 hai g\u00f3c k\u1ec1 m\u1ed9t \u0111\u00e1y b\u1eb1ng nhau.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 h\u00ecnh thang c\u00f3 2 c\u1ea1nh \u0111\u00e1y b\u1eb1ng nhau v\u00e0 2 c\u1ea1nh b\u00ean song song v\u00e0 b\u1eb1ng nhau.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh ch\u1eef nh\u1eadt l\u00e0 h\u00ecnh thang v\u1eeba vu\u00f4ng v\u1eeba c\u00e2n.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-10.jpg\" alt=\"H\u00ecnh thang trong h\u00ecnh h\u1ecdc. (\u1ea2nh: Internet) \" width=\"800\" height=\"340\"><\/p>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch h\u00ecnh thang ch\u00ednh l\u00e0 to\u00e0n b\u1ed9 ph\u1ea7n m\u1eb7t ph\u1eb3ng thu\u1ed9c b\u00ean trong 4 c\u1ea1nh b\u00ean m\u00e0 m\u1ecdi ng\u01b0\u1eddi c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c. C\u00f4ng th\u1ee9c \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng t\u1ed5ng \u0111\u1ed9 d\u00e0i hai \u0111\u00e1y nh\u00e2n v\u1edbi chi\u1ec1u cao r\u1ed3i \u0111em chia cho 2.<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">S = h x ((a + b)\/2)<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S: di\u1ec7n t\u00edch h\u00ecnh thang.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">h: chi\u1ec1u cao n\u1ed1i t\u1eeb \u0111\u1ec9nh t\u1edbi \u0111\u00e1y c\u1ee7a h\u00ecnh thang.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a v\u00e0 b: hai c\u1ea1nh \u0111\u00e1y c\u1ee7a h\u00ecnh thang.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng t\u00ednh di\u1ec7n t\u00edch c\u00e1c d\u1ea1ng h\u00ecnh thang:<\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fff4f5;margin-left: auto;margin-right: auto\">\n<tr>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">D\u1ea1ng h\u00ecnh thang<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c di\u1ec7n t\u00edch (S)<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #ee202e\">\n<p dir=\"ltr\">Ghi ch\u00fa<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">H\u00ecnh thang th\u01b0\u1eddng<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-11.jpg\" alt=\"\" width=\"200\" height=\"97\"><\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">S = h x ((a + b)\/2)<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">h: chi\u1ec1u cao n\u1ed1i t\u1eeb \u0111\u1ec9nh t\u1edbi \u0111\u00e1y c\u1ee7a h\u00ecnh thang.<\/p>\n<p dir=\"ltr\">a v\u00e0 b: hai c\u1ea1nh \u0111\u00e1y c\u1ee7a h\u00ecnh thang.<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">H\u00ecnh thang vu\u00f4ng<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-14.png\" alt=\"\" width=\"200\" height=\"140\"><\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">S = 1\u20442 h (a + b)<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">h: \u0111\u1ed9 d\u00e0i c\u1ea1nh b\u00ean vu\u00f4ng g\u00f3c v\u1edbi 2 \u0111\u00e1y<\/p>\n<p dir=\"ltr\">a v\u00e0 b: \u0111\u1ed9 d\u00e0i 2 c\u1ea1nh \u0111\u00e1y c\u1ee7a h\u00ecnh thang<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">H\u00ecnh thang c\u00e2n<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-15.jpg\" alt=\"\" width=\"200\" height=\"109\"><\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">S = h x ((a + b)\/2)<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">h = AH ho\u1eb7c BK: chi\u1ec1u cao n\u1ed1i t\u1eeb \u0111\u1ec9nh t\u1edbi \u0111\u00e1y c\u1ee7a h\u00ecnh thang.<\/p>\n<p dir=\"ltr\">a = AB &amp; b = CD: hai c\u1ea1nh \u0111\u00e1y c\u1ee7a h\u00ecnh thang.<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">Chi ti\u1ebft di\u1ec7n t\u00edch h\u00ecnh thang: C\u00e1ch t\u00ednh di\u1ec7n t\u00edch h\u00ecnh thang &amp; b\u00e0i t\u1eadp th\u1ef1c h\u00e0nh k\u00e8m \u0111\u00e1p \u00e1n chi ti\u1ebft\u00a0<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_dien_tich_hinh_vuong\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Trong h\u00ecnh h\u1ecdc ph\u1eb3ng, h\u00ecnh vu\u00f4ng ch\u00ednh l\u00e0 h\u00ecnh t\u1ee9 gi\u00e1c \u0111\u1ec1u v\u1edbi 4 g\u00f3c vu\u00f4ng b\u1eb1ng nhau c\u00f9ng v\u1edbi 4 c\u1ea1nh b\u1eb1ng nhau. Th\u1ef1c t\u1ebf, h\u00ecnh vu\u00f4ng l\u00e0 m\u1ed9t d\u1ea1ng h\u00ecnh \u0111\u1eb7c bi\u1ec7t c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt khi c\u00f3 2 c\u1ea1nh b\u1eb1ng nhau, hay c\u0169ng l\u00e0 h\u00ecnh thoi v\u1edbi 2 \u0111\u01b0\u1eddng ch\u00e9o b\u1eb1ng nhau.<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-13.png\" alt=\"H\u00ecnh vu\u00f4ng trong h\u00ecnh ph\u1eb3ng. (\u1ea2nh: Internet) \" width=\"800\" height=\"653\"><\/p>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng b\u1eb1ng \u0111\u1ed9 d\u00e0i c\u1ea1nh nh\u00e2n v\u1edbi ch\u00ednh n\u00f3. C\u00f4ng th\u1ee9c nh\u01b0 sau:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">S = a x a<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S l\u00e0 di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a l\u00e0 \u0111\u1ed9 d\u00e0i c\u1ea1nh c\u1ee7a h\u00ecnh vu\u00f4ng<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">Chi ti\u1ebft di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng: C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng l\u00e0 g\u00ec? B\u00e0i t\u1eadp v\u00e0 b\u00ed quy\u1ebft th\u1ef1c h\u00e0nh hi\u1ec7u qu\u1ea3\u00a0<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_dien_tich_hinh_thoi\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh thoi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">H\u00ecnh thoi l\u00e0 m\u1ed9t h\u00ecnh t\u1ee9 gi\u00e1c c\u00f3 4 c\u1ea1nh b\u1eb1ng nhau. \u0110\u00e2y c\u0169ng l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh v\u1edbi hai \u0111\u01b0\u1eddng ch\u00e9o vu\u00f4ng g\u00f3c v\u1edbi nhau hay hai c\u1ea1nh k\u1ec1 b\u1eb1ng nhau.<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-12.jpg\" alt=\"H\u00ecnh thoi trong h\u00ecnh h\u1ecdc. (\u1ea2nh: Internet) \" width=\"800\" height=\"486\"><\/p>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch h\u00ecnh thoi l\u00e0 ph\u1ea7n m\u1eb7t ph\u1eb3ng c\u1ee7a h\u00ecnh m\u00e0 ch\u00fang ta nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c, ch\u00fang \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c 1 n\u1eeda t\u00edch c\u1ee7a hai \u0111\u01b0\u1eddng ch\u00e9o. V\u1edbi m\u1ed9t h\u00ecnh thoi ABCD ch\u00fang ta s\u1ebd c\u00f3 c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">S = \u00bd x (d1 x d2) ho\u1eb7c S = h x a<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">S: L\u00e0 di\u1ec7n t\u00edch h\u00ecnh thoi<\/li>\n<li dir=\"ltr\">d1 v\u00e0 d2:\u00a0 L\u1ea7n l\u01b0\u1ee3t l\u00e0 \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh thoi.<\/li>\n<li dir=\"ltr\">h: Chi\u1ec1u cao c\u1ee7a h\u00ecnh thoi.<\/li>\n<li dir=\"ltr\">a: C\u1ea1nh h\u00ecnh thoi<\/li>\n<\/ul>\n<p dir=\"ltr\">Chi ti\u1ebft di\u1ec7n t\u00edch h\u00ecnh thoi: C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh thoi v\u00e0 h\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp chi ti\u1ebft\u00a0<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cach_tinh_dien_tich_hinh_tron\"><\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch h\u00ecnh tr\u00f2n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-16.png\" alt=\"H\u00ecnh tr\u00f2n trong h\u00ecnh h\u1ecdc. (\u1ea2nh: Internet)\" width=\"800\" height=\"433\"><\/p>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh tr\u00f2n \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn l\u00e0 ph\u1ea7n di\u1ec7n t\u00edch n\u1eb1m ph\u00eda trong \u0111\u01b0\u1eddng tr\u00f2n, ch\u00fang t\u1ef7 l\u1ec7 thu\u1eadn c\u00f9ng v\u1edbi b\u00ecnh ph\u01b0\u01a1ng b\u00e1n k\u00ednh c\u1ee7a n\u00f3. C\u00f4ng th\u1ee9c t\u00ednh b\u1eb1ng t\u00edch gi\u1eefa s\u1ed1 PI v\u00e0 b\u00ecnh ph\u01b0\u01a1ng b\u00e1n k\u00ednh c\u1ee7a h\u00ecnh tr\u00f2n \u0111\u00f3.<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">S = \u03c0R^2<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S: l\u00e0 di\u1ec7n t\u00edch \u0111\u01b0\u1eddng tr\u00f2n<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u03c0: l\u00e0 s\u1ed1 PI, v\u1edbi \u03c0 = 3,14<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">R: l\u00e0 b\u00e1n k\u00ednh h\u00ecnh tr\u00f2n<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">L\u01b0u \u00fd: <em>\u0110\u1ec3 c\u00f3 th\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c di\u1ec7n t\u00edch c\u1ee7a m\u1ed9t h\u00ecnh tr\u00f2n, m\u1ecdi ng\u01b0\u1eddi ph\u1ea3i bi\u1ebft \u0111\u01b0\u1ee3c b\u00e1n k\u00ednh c\u1ee7a h\u00ecnh. M\u1ed9t s\u1ed1 \u0111\u1ea1i l\u01b0\u1ee3ng gi\u00fap c\u00e1c em t\u00ecm \u0111\u01b0\u1ee3c b\u00e1n k\u00ednh c\u1ee7a h\u00ecnh tr\u00f2n v\u00e0 t\u00ednh d\u01b0\u1ee3c S nh\u01b0 sau:<\/em><\/p>\n<p dir=\"ltr\">\u0110\u01b0\u1eddng k\u00ednh h\u00ecnh tr\u00f2n: d = 2R =&gt; R = d\/2 =&gt; S = \u03c0d2\/4<\/p>\n<p dir=\"ltr\">Chu vi h\u00ecnh tr\u00f2n: C = \u03c0d = 2\u03c0R =&gt; R = C\/2\u03c0 =&gt; S = C2\/4\u03c0<\/p>\n<p dir=\"ltr\">Chi ti\u1ebft di\u1ec7n t\u00edch h\u00ecnh tr\u00f2n: https:\/\/www.ckconitsha.com\/vn\/ba-me-can-biet\/giao-duc\/kien-thuc-co-ban\/dien-tich-hinh-tron\u00a0\u00a0<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_dang_toan_ve_dien_tich_thuong_gap_nhat\"><\/span>C\u00e1c d\u1ea1ng to\u00e1n v\u1ec1 di\u1ec7n t\u00edch th\u01b0\u1eddng g\u1eb7p nh\u1ea5t<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trong ph\u1ea7n ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 di\u1ec7n t\u00edch h\u00ecnh h\u1ecdc, con c\u1ea7n n\u1eafm \u0111\u01b0\u1ee3c c\u00e1ch l\u00e0m c\u1ee7a 7 d\u1ea1ng to\u00e1n ph\u1ed5 bi\u1ebfn d\u01b0\u1edbi \u0111\u00e2y:\u00a0<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Doc_va_viet_don_vi_dien_tich\"><\/span>\u0110\u1ecdc v\u00e0 vi\u1ebft \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">L\u00e0 d\u1ea1ng b\u00e0i \u0111\u01a1n gi\u1ea3n nh\u1ea5t gi\u00fap c\u00e1c b\u1ea1n h\u1ecdc sinh n\u1eafm \u0111\u01b0\u1ee3c c\u00e1ch \u0111\u1ecdc v\u00e0 c\u00e1ch vi\u1ebft c\u00e1c lo\u1ea1i \u0111\u01a1n v\u1ecb \u0111o di\u1ec7n t\u00edch. \u0110\u01a1n v\u1ecb \u0111o di\u1ec7n t\u00edch g\u1ed3m:<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-19.jpg\" alt=\"B\u1ea3ng \u0111\u01a1n v\u1ecb \u0111o di\u1ec7n t\u00edch. (\u1ea2nh: Internet) \" width=\"800\" height=\"450\"><\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">km\u00b2: kilomet vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">hm\u00b2: hectomet vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">dam\u00b2: decamet vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">dm\u00b2: decimet vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">cm\u00b2: centimet vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">m\u00b2: m\u00e9t vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">mm\u00b2: milimet vu\u00f4ng<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">V\u00ed d\u1ee5: \u0110\u1ecdc c\u00e1c \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1 km\u00b2 \u0111\u1ecdc l\u00e0 m\u1ed9t kilomet vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">2 dm\u00b2 \u0111\u1ecdc l\u00e0 hai decimet vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">3 cm\u00b2 \u0111\u1ecdc l\u00e0 ba centimet vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">4m\u00b2 \u0111\u1ecdc l\u00e0 4 m\u00e9t vu\u00f4ng.<\/p>\n<\/li>\n<\/ul>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Quy_doi_cac_don_vi_dien_tich\"><\/span>Quy \u0111\u1ed5i c\u00e1c \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">D\u1ef1a v\u00e0o th\u1ee9 t\u1ef1 c\u00e1c \u0111\u01a1n v\u1ecb \u0111o di\u1ec7n t\u00edch tr\u00ean, c\u00e1c b\u1ea1n chuy\u1ec3n \u0111\u1ed5i \u0111\u01a1n v\u1ecb theo quy t\u1eafc: \u201cM\u1ed7i \u0111\u01a1n v\u1ecb li\u1ec1n sau s\u1ebd b\u1eb1ng 100 l\u1ea7n \u0111\u01a1n v\u1ecb \u0111\u1ee9ng tr\u01b0\u1edbc n\u00f3 v\u00e0 ng\u01b0\u1ee3c l\u1ea1i\u201d.<\/p>\n<p dir=\"ltr\">1m2 = 100 dm2 = 10000 cm2 = 1000000 mm2 ho\u1eb7c:<\/p>\n<p dir=\"ltr\">1.000.000 mm\u00b2 = 10.000 cm\u00b2 = 100 dm\u00b2 = 1 m\u00b2 = 0,01 dam\u00b2 = 0,0001 hm\u00b2 = 0,000 001 km\u00b2.<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: H\u00e3y \u0111\u1ed5i \u0111\u01a1n v\u1ecb \u0111o di\u1ec7n t\u00edch sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">5m\u00b2 = \u2026. cm\u00b2 =&gt; 5m\u00b2 = 50000 cm\u00b2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">12km\u00b2 = \u2026. m\u00b2 =&gt; 12km\u00b2 = 12000000 m\u00b2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">15hm\u00b2 = \u2026. m\u00b2 =&gt; 15hm\u00b2 = 150000 m\u00b2<\/p>\n<\/li>\n<\/ul>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tinh_dien_tich_voi_cac_yeu_to_cho_truoc\"><\/span>T\u00ednh di\u1ec7n t\u00edch v\u1edbi c\u00e1c y\u1ebfu t\u1ed1 cho tr\u01b0\u1edbc<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u00e2y l\u00e0 d\u1ea1ng b\u00e0i c\u01a1 b\u1ea3n trong ph\u1ea7n t\u00ednh di\u1ec7n t\u00edch c\u00e1c h\u00ecnh nh\u01b0 h\u00ecnh tr\u00f2n, h\u00ecnh vu\u00f4ng, h\u00ecnh tam gi\u00e1c, v.v\u2026 v\u1edbi c\u00e1c y\u1ebfu t\u1ed1 cho tr\u01b0\u1edbc nh\u01b0 \u0111\u1ed9 d\u00e0i c\u1ea1nh, chi\u1ec1u cao, \u0111\u01b0\u1eddng k\u00ednh, b\u00e1n k\u00ednh,&#8230;<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-20.jpg\" alt=\"C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch c\u00e1c h\u00ecnh c\u01a1 b\u1ea3n. (\u1ea2nh: Internet)\" width=\"800\" height=\"561\"><\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5:<\/p>\n<p dir=\"ltr\">a. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng ABCD bi\u1ebft c\u1ea1nh c\u1ee7a n\u00f3 l\u00e0 4cm.<\/p>\n<p dir=\"ltr\">H\u00ecnh vu\u00f4ng c\u00f3 4 c\u1ea1nh v\u1edbi \u0111\u1ed9 d\u00e0i b\u1eb1ng nhau =&gt; AB = BC = CD = DA = 4cm.<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng ta c\u00f3:<\/p>\n<p dir=\"ltr\">S = AB x CD = 4 x 4 = 16 (cm\u00b2)<\/p>\n<p dir=\"ltr\">b. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh tam gi\u00e1c ABC bi\u1ebft c\u1ea1nh \u0111\u00e1y BC = 10cm, chi\u1ec1u cao AH = 4cm.<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh tam gi\u00e1c ta c\u00f3:<\/p>\n<p dir=\"ltr\">S = \u00bd AH x BC = \u00bd x 4 x 10 = 20 (cm\u00b2)<\/p>\n<p dir=\"ltr\">c. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh tr\u00f2n bi\u1ebft b\u00e1n k\u00ednh r = 5cm.<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh tr\u00f2n ta c\u00f3:<\/p>\n<p dir=\"ltr\">S = \u03c0R^2 = 3.14 x 5^2 = 78.5 (cm\u00b2)<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cho_biet_dien_tich_tim_cac_yeu_to_con_lai\"><\/span>Cho bi\u1ebft di\u1ec7n t\u00edch t\u00ecm c\u00e1c y\u1ebfu t\u1ed1 c\u00f2n l\u1ea1i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Tr\u00e1i v\u1edbi d\u1ea1ng to\u00e1n tr\u00ean, \u0111\u1ec1 b\u00e0i s\u1ebd cho di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u1ea5t k\u1ef3 v\u00e0 y\u00eau c\u1ea7u b\u1ea1n t\u00ecm c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0: \u0111\u1ed9 d\u00e0i c\u1ea1nh, chi\u1ec1u cao, \u0111\u01b0\u1eddng k\u00ednh\/ b\u00e1n k\u00ednh h\u00ecnh tr\u00f2n, v.v\u2026<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: Cho h\u00ecnh thang ABCD c\u00f3 S = 42cm\u00b2, c\u1ea1nh AB = 5cm, c\u1ea1nh CD = 9cm. H\u00e3y t\u00ednh chi\u1ec1u cao AH c\u1ee7a h\u00ecnh thang \u0111\u00f3.<\/p>\n<p dir=\"ltr\">Ta c\u00f3 c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh thang: S = h x ((a + b)\/2)<\/p>\n<p dir=\"ltr\">=&gt; C\u00f4ng th\u1ee9c t\u00ednh chi\u1ec1u cao: h = S\/ ((a + b)\/2) = 42\/ ((5 + 9)\/2) = 6 (cm)<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"So_sanh_dien_tich_cac_hinh_cho_truoc\"><\/span>So s\u00e1nh di\u1ec7n t\u00edch c\u00e1c h\u00ecnh cho tr\u01b0\u1edbc<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Trong d\u1ea1ng b\u00e0i n\u00e0y, d\u1ef1a v\u00e0o c\u00e1c y\u1ebfu t\u1ed1 cho tr\u01b0\u1edbc, b\u1ea1n c\u1ea7n t\u00ednh \u0111\u01b0\u1ee3c di\u1ec7n t\u00edch c\u1ee7a 2 h\u00ecnh v\u00e0 so s\u00e1nh h\u00ecnh n\u00e0o l\u1edbn h\u01a1n, nh\u1ecf h\u01a1n hay b\u1eb1ng nhau.\u00a0<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-21.jpg\" alt=\"M\u1eabu b\u00e0i so s\u00e1nh di\u1ec7n t\u00edch c\u00e1c h\u00ecnh. (\u1ea2nh: Internet)\" width=\"800\" height=\"380\"><\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: Cho 2 h\u00ecnh tam gi\u00e1c:\u00a0<\/p>\n<p dir=\"ltr\">H\u00ecnh 1: Tam gi\u00e1c ABC c\u00f3 c\u1ea1nh \u0111\u00e1y = 10cm, chi\u1ec1u cao = 4cm<\/p>\n<p dir=\"ltr\">H\u00ecnh 2: Tam gi\u00e1c DEF c\u00f3 c\u1ea1nh \u0111\u00e1y = 8cm, chi\u1ec1u cao = 3cm<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch tam gi\u00e1c, ta c\u00f3:<\/p>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch tam gi\u00e1c ABC = S1 = \u00bd AH x BC = \u00bd x 4 x 10 = 20 (cm\u00b2)\u00a0<\/p>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch tam gi\u00e1c DEF = S2 = \u00bd DH x EF = \u00bd x 3 x 8 = 12 (cm\u00b2)<\/p>\n<p dir=\"ltr\">=&gt; Di\u1ec7n t\u00edch tam gi\u00e1c ABC &gt; Di\u1ec7n t\u00edch tam gi\u00e1c DEF<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ket_hop_dien_tich_voi_cac_khai_niem_khac_nhu_chu_vi_the_tich\"><\/span>K\u1ebft h\u1ee3p di\u1ec7n t\u00edch v\u1edbi c\u00e1c kh\u00e1i ni\u1ec7m kh\u00e1c nh\u01b0 chu vi, th\u1ec3 t\u00edch<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u00e2y l\u00e0 d\u1ea1ng to\u00e1n y\u00eau c\u1ea7u h\u1ecdc sinh c\u1ea7n n\u1eafm ch\u1eafc c\u00f4ng th\u1ee9c t\u00ednh c\u1ee7a 3 lo\u1ea1i \u0111\u01a1n v\u1ecb g\u1ed3m chu vi, di\u1ec7n t\u00edch v\u00e0 th\u1ec3 t\u00edch. D\u1ef1a v\u00e0o c\u00e1c y\u1ebfu t\u1ed1 cho tr\u01b0\u1edbc \u0111\u1ec3 t\u00ednh c\u00e1c y\u1ebfu t\u1ed1 c\u00f2n thi\u1ebfu trong h\u00ecnh \u0111\u00f3.<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: Cho h\u00ecnh tr\u00f2n c\u00f3 chu vi = 31.4cm. H\u00e3y t\u00ednh di\u1ec7n t\u00edch h\u00ecnh tr\u00f2n \u0111\u00f3.<\/p>\n<p dir=\"ltr\">Chu vi h\u00ecnh tr\u00f2n = C = 2\u03c0r = 31.4 (cm)<\/p>\n<p dir=\"ltr\">=&gt; B\u00e1n k\u00ednh r = C\/2\u03c0 = 31.4\/ (2 x 3.14) = 5 (cm)<\/p>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch h\u00ecnh tr\u00f2n = S = \u03c0R^2 = 3.14 x 5^2 = 78.5 (cm\u00b2)<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_toan_ung_dung_dien_tich_trong_doi_song_hang_ngay\"><\/span>B\u00e0i to\u00e1n \u1ee9ng d\u1ee5ng di\u1ec7n t\u00edch trong \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">D\u1ea1ng b\u00e0i n\u00e0y th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn t\u00edch di\u1ec7n t\u00edch \u0111\u1ea5t, ru\u1ed9ng, ao,&#8230;thay cho c\u00e1c h\u00ecnh kh\u1ed1i trong h\u00ecnh h\u1ecdc.\u00a0<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: Ng\u01b0\u1eddi ta m\u1edf r\u1ed9ng m\u1ed9t c\u00e1i ao h\u00ecnh vu\u00f4ng \u0111\u1ec3 \u0111\u01b0\u1ee3c m\u1ed9t c\u00e1i ao h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i g\u1ea5p 2 l\u1ea7n chi\u1ec1u r\u1ed9ng. Sau khi m\u1edf r\u1ed9ng, di\u1ec7n t\u00edch ao t\u0103ng th\u00eam 600m2 v\u00e0 di\u1ec7n t\u00edch ao m\u1edbi g\u1ea5p 4 l\u1ea7n ao c\u0169. H\u1ecfi ph\u1ea3i d\u00f9ng bao nhi\u00eau chi\u1ebfc c\u1ecdc \u0111\u1ec3 \u0111\u1ee7 r\u00e0o xung quanh ao m\u1edbi? Bi\u1ebft r\u1eb1ng c\u1ecdc n\u1ecd c\u00e1ch c\u1ecdc kia 1m v\u00e0 \u1edf m\u1ed9t g\u00f3c ao ng\u01b0\u1eddi ta \u0111\u1ec3 l\u1ed1i l\u00ean xu\u1ed1ng r\u1ed9ng 2m.<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-17.png\" alt=\"M\u00f4 ph\u1ecfng di\u1ec7n t\u00edch ao tr\u01b0\u1edbc &amp; sau khi m\u1edf r\u1ed9ng. (\u1ea2nh: Internet) \" width=\"800\" height=\"391\"><\/p>\n<p dir=\"ltr\">Ta c\u00f3 s\u01a1 \u0111\u1ed3:\u00a0<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-18.png\" alt=\"\" width=\"400\" height=\"103\"><\/p>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch ao m\u1edbi l\u00e0: 600 : (4 \u2013 1) x 4 = 800 (m2)<\/p>\n<p dir=\"ltr\">Ta chia ao m\u1edbi th\u00e0nh hai h\u00ecnh vu\u00f4ng c\u00f3 di\u1ec7n t\u00edch b\u1eb1ng nhau nh\u01b0 h\u00ecnh v\u1ebd. Di\u1ec7n t\u00edch m\u1ed9t h\u00ecnh vu\u00f4ng l\u00e0: 800 : 2 = 400 (m2)<\/p>\n<p dir=\"ltr\">V\u00ec 400 = 20 x 20<\/p>\n<p dir=\"ltr\">=&gt; C\u1ea1nh c\u1ee7a h\u00ecnh vu\u00f4ng hay chi\u1ec1u r\u1ed9ng c\u1ee7a ao m\u1edbi l\u00e0 20m<\/p>\n<p dir=\"ltr\">=&gt; Chi\u1ec1u d\u00e0i c\u1ee7a ao m\u1edbi l\u00e0: 20 x 2 = 40 (m)<\/p>\n<p dir=\"ltr\">=&gt; Chu vi \u00e1o m\u1edbi l\u00e0: (40 + 20) x 2 = 120(m)<\/p>\n<p dir=\"ltr\">S\u1ed1 c\u1ecdc \u0111\u1ec3 r\u00e0o xung quanh ao m\u1edbi l\u00e0: (120 \u2013 3) : 1 = 117 (chi\u1ebfc)<\/p>\n<p dir=\"ltr\">\u0110\u00e1p s\u1ed1: 117 chi\u1ebfc<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dien_tich_trong_bai_toan_thuc_te\"><\/span>Di\u1ec7n t\u00edch trong b\u00e0i to\u00e1n th\u1ef1c t\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trong th\u1ef1c t\u1ebf, c\u00e1c m\u1ea3nh \u0111\u1ea5t, th\u1eeda ru\u1ed9ng, c\u0103n nh\u00e0,&#8230; \u0111\u1ec1u \u0111\u01b0\u1ee3c t\u00ednh di\u1ec7n t\u00edch d\u1ef1a v\u00e0o c\u00e1c c\u00f4ng th\u1ee9c t\u00ednh tr\u00ean. Ho\u1eb7c c\u00f3 th\u1ec3 d\u1ef1a v\u00e0o di\u1ec7n t\u00edch \u0111\u1ec3 t\u00ednh s\u1ed1 l\u01b0\u1ee3ng v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng, s\u1ea3n l\u01b0\u1ee3ng thu ho\u1ea1ch d\u1ef1a tr\u00ean di\u1ec7n t\u00edch \u0111\u00e3 cho. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t v\u00e0i v\u00ed d\u1ee5 minh h\u1ecda:<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-22.jpg\" alt=\"V\u00ed d\u1ee5 v\u1ec1 di\u1ec7n t\u00edch trong t\u00ednh to\u00e1n th\u1ef1c t\u1ebf. (\u1ea2nh: Internet)\" width=\"800\" height=\"450\"><\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5 1: M\u1ed9t m\u1ea3nh v\u01b0\u1eddn h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 36cm, chi\u1ec1u r\u1ed9ng b\u1eb1ng 1\/4 chi\u1ec1u d\u00e0i. Di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 bao nhi\u00eau?<\/p>\n<p dir=\"ltr\">Chi\u1ec1u r\u1ed9ng = \u00bc chi\u1ec1u d\u00e0i =&gt; chi\u1ec1u r\u1ed9ng m\u1ea3nh v\u01b0\u1eddn = 36\/4 = 9 (cm)<\/p>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt = chi\u1ec1u d\u00e0i x chi\u1ec1u r\u1ed9ng = 36 x 9 = 324 (cm2)<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5 2: M\u1ed9t th\u1eeda ru\u1ed9ng h\u00ecnh thang c\u00f3 \u0111\u00e1y l\u1edbn 10m, \u0111\u00e1y b\u00e9 b\u1eb1ng \u2154 \u0111\u00e1y l\u1edbn v\u00e0 b\u1eb1ng 4\/3 chi\u1ec1u cao. Ng\u01b0\u1eddi ta tr\u1ed3ng ng\u00f4 tr\u00ean th\u1eeda ru\u1ed9ng \u0111\u00f3, t\u00ednh ra trung b\u00ecnh 100m2 thu \u0111\u01b0\u1ee3c 50kg ng\u00f4. H\u1ecfi c\u1ea3 th\u1eeda ru\u1ed9ng thu \u0111\u01b0\u1ee3c bao nhi\u00eau t\u1ea1 ng\u00f4?<\/p>\n<p dir=\"ltr\">\u0110\u00e1y b\u00e9 l\u00e0: 120 x 2 : 3 = 80 (m)<\/p>\n<p dir=\"ltr\">Chi\u1ec1u cao l\u00e0: 80 x 3 : 4 = 60 (m)<\/p>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch th\u1eeda ru\u1ed9ng l\u00e0: [(120 + 80) x 60]\/ 2 = 6000 (m2)<\/p>\n<p dir=\"ltr\">S\u1ed1 kg ng\u00f4 thu \u0111\u01b0\u1ee3c l\u00e0: 6000 x 50 : 100 = 3000 (kg) = 30 t\u1ea1<\/p>\n<p dir=\"ltr\">V\u1eady n\u1ebfu tr\u1ed3ng ng\u00f4 tr\u00ean th\u1eeda ru\u1ed9ng \u0111\u00f3 s\u1ebd thu \u0111\u01b0\u1ee3c 30 t\u1ea1 ng\u00f4.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ung_dung_dien_tich_trong_linh_vuc_khac_nhau\"><\/span>\u1ee8ng d\u1ee5ng di\u1ec7n t\u00edch trong l\u0129nh v\u1ef1c kh\u00e1c nhau<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-23.jpg\" alt=\"\u1ee8ng d\u1ee5ng t\u00ednh di\u1ec7n t\u00edch c\u0103n h\u1ed9. (\u1ea2nh: Internet)\" width=\"800\" height=\"540\"><\/p>\n<p dir=\"ltr\">Trong th\u1ef1c t\u1ebf, di\u1ec7n t\u00edch c\u00f2n \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong c\u00e1c l\u0129nh v\u1ef1c nh\u01b0 ki\u1ebfn tr\u00fac, khoa h\u1ecdc c\u00f4ng ngh\u1ec7, gi\u00e1o d\u1ee5c, y t\u1ebf. C\u1ee5 th\u1ec3:<\/p>\n<ul>\n<li dir=\"ltr\">Ki\u1ebfn tr\u00fac v\u00e0 x\u00e2y d\u1ef1ng: Trong l\u0129nh v\u1ef1c n\u00e0y, di\u1ec7n t\u00edch \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 t\u00ednh to\u00e1n m\u1eb7t b\u1eb1ng c\u1ee7a m\u1ed9t c\u00f4ng tr\u00ecnh, khu \u0111\u1ea5t, ho\u1eb7c c\u0103n h\u1ed9. Vi\u1ec7c t\u00ednh to\u00e1n di\u1ec7n t\u00edch gi\u00fap \u0111\u1ecbnh r\u00f5 di\u1ec7n t\u00edch c\u1ea7n s\u1eed d\u1ee5ng cho c\u00e1c m\u1ee5c \u0111\u00edch thi\u1ebft k\u1ebf, l\u1eadp k\u1ebf ho\u1ea1ch x\u00e2y d\u1ef1ng v\u00e0 \u0111\u00e1nh gi\u00e1 chi ph\u00ed x\u00e2y d\u1ef1ng.<\/li>\n<li dir=\"ltr\">N\u00f4ng nghi\u1ec7p: Trong n\u00f4ng nghi\u1ec7p, di\u1ec7n t\u00edch \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh to\u00e1n di\u1ec7n t\u00edch \u0111\u1ea5t canh t\u00e1c v\u00e0 \u0111\u1ea5t tr\u1ed3ng c\u00e2y tr\u1ed3ng. Vi\u1ec7c \u0111o v\u00e0 qu\u1ea3n l\u00fd di\u1ec7n t\u00edch \u0111\u1ea5t canh t\u00e1c gi\u00fap n\u00f4ng d\u00e2n t\u1ed1i \u01b0u h\u00f3a s\u1eed d\u1ee5ng \u0111\u1ea5t v\u00e0 l\u1eadp k\u1ebf ho\u1ea1ch tr\u1ed3ng tr\u1ecdt hi\u1ec7u qu\u1ea3.<\/li>\n<li dir=\"ltr\">T\u00e0i ch\u00ednh v\u00e0 b\u1ea5t \u0111\u1ed9ng s\u1ea3n: Di\u1ec7n t\u00edch \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a m\u1ed9t m\u1ea3nh \u0111\u1ea5t, nh\u00e0 \u1edf, ho\u1eb7c c\u0103n h\u1ed9. Di\u1ec7n t\u00edch c\u0169ng c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn gi\u00e1 b\u00e1n v\u00e0 gi\u00e1 thu\u00ea c\u1ee7a m\u1ed9t t\u00e0i s\u1ea3n.<\/li>\n<li dir=\"ltr\">\u0110\u1ecba l\u00fd v\u00e0 m\u00f4i tr\u01b0\u1eddng: Di\u1ec7n t\u00edch \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 nghi\u00ean c\u1ee9u v\u00e0 \u0111\u00e1nh gi\u00e1 di\u1ec7n t\u00edch c\u1ee7a c\u00e1c khu v\u1ef1c \u0111\u1ea5t li\u1ec1n, h\u1ed3, s\u00f4ng, hay c\u00e1c khu v\u1ef1c thi\u00ean nhi\u00ean kh\u00e1c. \u0110i\u1ec1u n\u00e0y gi\u00fap hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m \u0111\u1ecba h\u00ecnh v\u00e0 m\u00f4i tr\u01b0\u1eddng c\u1ee7a m\u1ed9t khu v\u1ef1c c\u1ee5 th\u1ec3.<\/li>\n<li dir=\"ltr\">Gi\u00e1o d\u1ee5c: Trong gi\u00e1o d\u1ee5c, di\u1ec7n t\u00edch \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c b\u00e0i to\u00e1n h\u00ecnh h\u1ecdc v\u00e0 b\u00e0i t\u1eadp v\u1ec1 t\u00ednh di\u1ec7n t\u00edch c\u1ee7a c\u00e1c h\u00ecnh h\u1ecdc \u0111\u01a1n gi\u1ea3n nh\u01b0 h\u00ecnh vu\u00f4ng, h\u00ecnh ch\u1eef nh\u1eadt, tam gi\u00e1c, v.v.<\/li>\n<li dir=\"ltr\">Y t\u1ebf v\u00e0 khoa h\u1ecdc: Trong m\u1ed9t s\u1ed1 nghi\u00ean c\u1ee9u y t\u1ebf v\u00e0 khoa h\u1ecdc, di\u1ec7n t\u00edch \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o k\u00edch th\u01b0\u1edbc v\u00e0 ph\u00e2n t\u00edch c\u00e1c t\u1ed5 ch\u1ee9c, m\u00f4, hay \u0111\u1ed1i t\u01b0\u1ee3ng nh\u1ecf h\u01a1n, \u0111\u1eb7c bi\u1ec7t trong vi\u1ec7c nghi\u00ean c\u1ee9u t\u1ebf b\u00e0o v\u00e0 m\u00f4 h\u1ecdc.<\/li>\n<\/ul>\n<p dir=\"ltr\" style=\"line-height: 1.7999999999999998;margin-top: 0pt;margin-bottom: 0pt\">Tr\u00ean \u0111\u00e2y l\u00e0 t\u1ed5ng quan v\u1ec1 c\u00e1c c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh c\u01a1 b\u1ea3n c\u00f9ng \u1ee9ng d\u1ee5ng trong th\u1ef1c t\u1ebf. B\u1ea1n h\u1ecdc c\u00f3 th\u1ec3 l\u01b0u l\u1ea1i c\u00f4ng th\u1ee9c v\u00e0 \u00e1p d\u1ee5ng trong c\u00e1c b\u00e0i t\u1eadp h\u00ecnh kh\u1ed1i. \u0110\u1eebng qu\u00ean k\u1ebft h\u1ee3p chu\u1ed7i b\u00e0i h\u00ecnh h\u1ecdc trong ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc to\u00e1n GDPT Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math \u0111\u1ec3 n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y!<\/p>\n<p>Ngu\u1ed3n: <a href=\"https:\/\/www.ckconitsha.com\/vn\/\">https:\/\/www.ckconitsha.com\/vn\/<\/a> T\u00e1c gi\u1ea3: <a href=\"https:\/\/www.ckconitsha.com\/vn\/author\/nguyenlandung\">Nguy\u1ec5n L\u00e2n d\u0169ng<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Di\u1ec7n t\u00edch l\u00e0 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n trong h\u00ecnh h\u1ecdc v\u00e0 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng nhi\u1ec1u trong th\u1ef1c ti\u1ec5n. Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd c\u00f9ng c\u00e1c b\u1ea1n t\u1ed5ng h\u1ee3p l\u1ea1i c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch c\u00e1c h\u00ecnh ph\u1eb3ng \u0111\u01a1n gi\u1ea3n trong b\u00e0i vi\u1ebft n\u00e0y! View all \u0110\u1ecbnh ngh\u0129a di\u1ec7n t\u00edch l\u00e0 g\u00ec? Di\u1ec7n&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-14261","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14261","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=14261"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14261\/revisions"}],"predecessor-version":[{"id":17086,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14261\/revisions\/17086"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=14261"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=14261"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=14261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}