{"id":13997,"date":"2025-06-06T01:03:47","date_gmt":"2025-06-05T18:03:47","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=13997"},"modified":"2025-07-03T22:00:04","modified_gmt":"2025-07-03T15:00:04","slug":"cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/","title":{"rendered":"C\u00e1c c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c chu\u1ea9n &#8211; Monkey"},"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\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cong_thuc_tinh_dien_tich_hinh_tu_giac_la_gi\" >C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c 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\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cac_cach_tinh_dien_tich_tu_giac_Tieu_hoc\" >C\u00e1c c\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c Ti\u1ec3u h\u1ecdc<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cach_tinh_dien_tich_hinh_tu_giac_binh_hanh\" >C\u00e1ch t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c 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-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cong_thuc_tinh_dien_tich_tu_giac_vuong\" >C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c vu\u00f4ng<\/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\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cach_tinh_dien_tich_cua_hinh_tu_giac_tu_nhon_hoac_khong_vuong\" >C\u00e1ch t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c t\u00f9 nh\u1ecdn ho\u1eb7c kh\u00f4ng vu\u00f4ng<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cong_thuc_tinh_dien_tich_cua_tu_giac_dac_biet\" >C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch c\u1ee7a t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cach_tinh_dien_tich_tu_giac_la_hinh_vuong\" >C\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c l\u00e0 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\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cong_thuc_tinh_dien_tich_hinh_tu_giac_la_hinh_chu_nhat\" >C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 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-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cach_tinh_dien_tich_tu_giac_dac_biet_la_hinh_binh_hanh\" >C\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t l\u00e0 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-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cong_thuc_tinh_dien_tich_hinh_tu_giac_la_hinh_thoi\" >C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 h\u00ecnh thoi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cach_tinh_dien_tich_tu_giac_la_hinh_thang\" >C\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c l\u00e0 h\u00ecnh thang<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cac_cach_tinh_dien_tich_cua_hinh_tu_giac_khong_dung_cong_thuc\" >C\u00e1c c\u00e1ch t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c kh\u00f4ng d\u00f9ng c\u00f4ng th\u1ee9c<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Tinh_dien_tich_tu_giac_khi_biet_duong_cheo_chinh\" >T\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c khi bi\u1ebft \u0111\u01b0\u1eddng ch\u00e9o ch\u00ednh<\/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\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cach_tinh_dien_tich_cua_hinh_tu_giac_khi_biet_duong_cao\" >C\u00e1ch t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c khi bi\u1ebft \u0111\u01b0\u1eddng cao<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Cac_dang_toan_tinh_dien_tich_tu_giac\" >C\u00e1c d\u1ea1ng to\u00e1n t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Dang_1_Tinh_dien_tich_cua_tu_giac_dac_biet_khi_cho_thong_tin_mot_canh_duong_cao\" >D\u1ea1ng 1: T\u00ednh di\u1ec7n t\u00edch c\u1ee7a t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t khi cho th\u00f4ng tin m\u1ed9t c\u1ea1nh, \u0111\u01b0\u1eddng cao<\/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\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Dang_2_Tinh_canh_duong_cao_khi_biet_dien_tich_tu_giac\" >D\u1ea1ng 2: T\u00ednh c\u1ea1nh, \u0111\u01b0\u1eddng cao khi bi\u1ebft di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c<\/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\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Bai_tap_toan_lien_quan_toi_dien_tich_hinh_tu_giac_de_be_luyen_tap\" >B\u00e0i t\u1eadp to\u00e1n li\u00ean quan t\u1edbi di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c \u0111\u1ec3 b\u00e9 luy\u1ec7n t\u1eadp<\/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\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Bi_quyet_giup_be_hoc_ghi_nho_kien_thuc_dien_tich_tu_giac_hieu_qua\" >B\u00ed quy\u1ebft gi\u00fap b\u00e9 h\u1ecdc, ghi nh\u1edb ki\u1ebfn th\u1ee9c di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c hi\u1ec7u qu\u1ea3<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Dam_bao_be_nam_vung_kien_thuc_co_ban_cua_hinh_tu_giac\" >\u0110\u1ea3m b\u1ea3o b\u00e9 n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Thuc_hanh_thuong_xuyen_la_yeu_to_quan_trong\" >Th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Doc_ky_de_bai_toan_dua_ra\" >\u0110\u1ecdc k\u1ef9 \u0111\u1ec1 b\u00e0i to\u00e1n \u0111\u01b0a ra<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.ckconitsha.com\/vn\/cac-cong-thuc-tinh-dien-tich-hinh-tu-giac-chuan-monkey\/#Tao_su_hung_thu_khi_hoc_toan_voi_be_cung_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_Math\" >T\u1ea1o s\u1ef1 h\u1ee9ng th\u00fa khi h\u1ecdc to\u00e1n v\u1edbi b\u00e9 c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 m\u1ed9t ph\u1ea7n ki\u1ebfn th\u1ee9c to\u00e1n h\u00ecnh c\u1ea7n n\u1eafm v\u1eefng. Nh\u01b0ng v\u00ec h\u00ecnh t\u1ee9 gi\u00e1c c\u00f3 nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau, n\u00ean \u0111\u1ec3 gi\u00fap c\u00e1c em h\u1ecdc v\u00e0 ghi nh\u1edb ki\u1ebfn th\u1ee9c m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, h\u00e3y c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef tham kh\u1ea3o ngay b\u00e0i vi\u1ebft sau \u0111\u00e2y.<\/p>\n<p>                        View all<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_dien_tich_hinh_tu_giac_la_gi\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u1ef1a v\u00e0o \u0111\u1ecbnh ngh\u0129a h\u00ecnh t\u1ee9 gi\u00e1c, ta bi\u1ebft \u0111\u01b0\u1ee3c s\u1ebd c\u00f3 nhi\u1ec1u lo\u1ea1i h\u00ecnh t\u1ee9 gi\u00e1c kh\u00e1c nhau t\u1eeb t\u1ee9 gi\u00e1c l\u00f5m, l\u1ed3i, \u0111\u1ec1u, kh\u00f4ng \u0111\u1ec1u&#8230;. Trong \u0111\u00f3, t\u1ee9 gi\u00e1c l\u1ed3i s\u1ebd g\u1ed3m nh\u1eefng h\u00ecnh nh\u01b0 ch\u1eef nh\u1eadt, vu\u00f4ng, h\u00ecnh thang, h\u00ecnh thoi, h\u00ecnh b\u00ecnh h\u00e0nh, t\u1ee9 gi\u00e1c b\u1ea5t k\u1ef3,&#8230;\u00a0D\u00f9 v\u1eady, \u0111\u1ed1i v\u1edbi c\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c s\u1ebd KH\u00d4NG C\u00d3 c\u00f4ng th\u1ee9c chung n\u00e0o c\u1ea3.\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-hinh-tu-giac-01.png\" alt=\"C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 g\u00ec? (\u1ea2nh: Internet)\" width=\"800\" height=\"416\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_cach_tinh_dien_tich_tu_giac_Tieu_hoc\"><\/span>C\u00e1c c\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c Ti\u1ec3u h\u1ecdc<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Trong ch\u01b0\u01a1ng tr\u00ecnh l\u1edbp 4 v\u00e0 l\u1edbp 5, c\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m quen c\u00e1c c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c th\u01b0\u1eddng, t\u1ee9 gi\u00e1c t\u00f9, nh\u1ecdn,&#8230; D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch t\u00ednh c\u00e1c lo\u1ea1i t\u1ee9 gi\u00e1c \u0111\u00f3:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cach_tinh_dien_tich_hinh_tu_giac_binh_hanh\"><\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c b\u00ecnh h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0: S = c\u1ea1nh x chi\u1ec1u cao t\u01b0\u01a1ng \u1ee9ng c\u1ee7a c\u1ea1nh \u0111\u00f3.<\/p>\n<p>V\u00ed d\u1ee5: Cho h\u00ecnh t\u1ee9 gi\u00e1c ABCD l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh, c\u1ea1nh AB l\u00e0 c\u1ea1nh \u0111\u00e1y v\u00e0 \u0111\u1ed9 d\u00e0i AH l\u00e0 chi\u1ec1u cao t\u01b0\u01a1ng \u1ee9ng c\u1ee7a c\u1ea1nh AB.<\/p>\n<p>=&gt; Di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c l\u00e0: S = AB x AH.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_dien_tich_tu_giac_vuong\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c vu\u00f4ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ed1i v\u1edbi h\u00ecnh t\u1ee9 gi\u00e1c vu\u00f4ng, c\u00f4ng th\u1ee9c di\u1ec7n t\u00edch l\u00e0: S = (\u0111\u00e1y x chi\u1ec1u cao) \/ 2.<\/p>\n<p>V\u00ed d\u1ee5: Cho h\u00ecnh t\u1ee9 gi\u00e1c ABCD l\u00e0 h\u00ecnh vu\u00f4ng, c\u1ea1nh AB l\u00e0 c\u1ea1nh \u0111\u00e1y v\u00e0 \u0111\u1ed9 d\u00e0i AH l\u00e0 chi\u1ec1u cao t\u01b0\u01a1ng \u1ee9ng c\u1ee7a c\u1ea1nh AB.<\/p>\n<p>=&gt; Di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c l\u00e0: S = (AB x AH) \/ 2.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Cach_tinh_dien_tich_cua_hinh_tu_giac_tu_nhon_hoac_khong_vuong\"><\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c t\u00f9 nh\u1ecdn ho\u1eb7c kh\u00f4ng vu\u00f4ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ec3 t\u00ednh di\u1ec7n t\u00edch c\u00e1c t\u1ee9 gi\u00e1c t\u00f9 nh\u1ecdn, kh\u00f4ng c\u00f3 g\u00f3c vu\u00f4ng, b\u1ea1n c\u1ea7n d\u1ef1a v\u00e0o th\u00f4ng tin c\u1ee5 th\u1ec3 c\u1ee7a t\u1ee9 gi\u00e1c \u0111\u00f3 v\u00ec KH\u00d4NG C\u00d3 c\u00f4ng th\u1ee9c chung cho lo\u1ea1i h\u00ecnh n\u00e0y. C\u00e1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u1ec3 t\u00ednh di\u1ec7n t\u00edch c\u1ee7a t\u1ee9 gi\u00e1c n\u00e0y, ta c\u1ea7n chia nh\u1ecf c\u00e1c h\u00ecnh ph\u1ea7n nh\u1ecf h\u01a1n c\u00f3 c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn (v\u00ed d\u1ee5: h\u00ecnh tam gi\u00e1c, h\u00ecnh ch\u1eef nh\u1eadt, &#8230;), sau \u0111\u00f3 t\u00ednh di\u1ec7n t\u00edch c\u1ee7a t\u1eebng h\u00ecnh ph\u1ea7n v\u00e0 c\u1ed9ng l\u1ea1i.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-hinh-tu-giac-02.png\" alt=\"C\u00e1c c\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c Ti\u1ec3u h\u1ecdc. (\u1ea2nh: Internet)\" width=\"800\" height=\"368\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_dien_tich_cua_tu_giac_dac_biet\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch c\u1ee7a t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">T\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t l\u00e0 nh\u1eefng h\u00ecnh c\u01a1 b\u1ea3n nh\u01b0 h\u00ecnh vu\u00f4ng, ch\u1eef nh\u1eadt, h\u00ecnh thoi,&#8230; N\u00ean c\u00e1ch t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c cho c\u00e1c b\u1ea1n l\u1edbp 4, l\u1edbp 5 c\u1ee7a m\u1ed7i h\u00ecnh c\u1ee5 th\u1ec3 nh\u01b0 sau:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cach_tinh_dien_tich_tu_giac_la_hinh_vuong\"><\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c l\u00e0 h\u00ecnh vu\u00f4ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1eb7c \u0111i\u1ec3m: \u0110\u00e2y l\u00e0 h\u00ecnh t\u1ee9 gi\u00e1c l\u1ed3i v\u1edbi 4 g\u00f3c vu\u00f4ng v\u00e0 4 c\u1ea1nh b\u1eb1ng nhau.<\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch: S = a x a = a2<\/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 vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a: \u0110\u1ed9 d\u00e0i c\u1ea1nh<\/p>\n<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-hinh-tu-giac-03.jpg\" alt=\"C\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c l\u00e0 h\u00ecnh vu\u00f4ng. (\u1ea2nh: Internet)\" width=\"800\" height=\"696\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_dien_tich_hinh_tu_giac_la_hinh_chu_nhat\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 h\u00ecnh ch\u1eef nh\u1eadt<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1eb7c \u0111i\u1ec3m: L\u00e0 t\u1ee9 gi\u00e1c l\u1ed3i g\u1ed3m 2 c\u1eb7p c\u1ea1nh \u0111\u1ed1i di\u1ec7n b\u1eb1ng nhau v\u00e0 4 g\u00f3c vu\u00f4ng.<\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch: S = a x b<\/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 ch\u1eef nh\u1eadt<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a: Chi\u1ec1u d\u00e0i<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">b: Chi\u1ec1u r\u1ed9ng<\/p>\n<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-hinh-tu-giac-04.jpg\" alt=\"C\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c l\u00e0 h\u00ecnh ch\u1eef nh\u1eadt. (\u1ea2nh: Internet)\" width=\"800\" height=\"502\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cach_tinh_dien_tich_tu_giac_dac_biet_la_hinh_binh_hanh\"><\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1eb7c \u0111i\u1ec3m: L\u00e0 t\u1ee9 gi\u00e1c l\u1ed3i c\u00f3 hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i di\u1ec7n song song v\u00e0 b\u1eb1ng nhau.<\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch: S = a x h<\/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 b\u00ecnh h\u00e0nh<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a: C\u1ea1nh \u0111\u00e1y h\u00ecnh thoi<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">h: \u0110\u01b0\u1eddng cao h\u00ecnh thoi<\/p>\n<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-hinh-tu-giac-05.png\" alt=\"C\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh. (\u1ea2nh: Internet)\" width=\"800\" height=\"407\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_dien_tich_hinh_tu_giac_la_hinh_thoi\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 h\u00ecnh thoi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 chi ti\u1ebft c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh thoi trong to\u00e1n h\u1ecdc:<\/p>\n<p dir=\"ltr\">\u0110\u1eb7c \u0111i\u1ec3m: L\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 4 c\u1ea1nh b\u1eb1ng nhau.<\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch: S = 1\u20442 (d1 x d2)<\/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 thoi<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">d1, d2: \u0110\u1ed9 d\u00e0i 2 \u0111\u01b0\u1eddng ch\u00e9o<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">\u0110\u1eb7c bi\u1ec7t, v\u1edbi c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh thoi c\u0169ng c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng \u0111\u1ec3 t\u00ednh cho b\u00ecnh b\u00ecnh h\u00e0nh.<\/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-hinh-tu-giac-06.png\" alt=\"C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 h\u00ecnh thoi. (\u1ea2nh: Internet)\" width=\"800\" height=\"592\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cach_tinh_dien_tich_tu_giac_la_hinh_thang\"><\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c l\u00e0 h\u00ecnh thang<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1eb7c \u0111i\u1ec3m: L\u00e0 t\u1ee9 gi\u00e1c l\u1ed3i c\u00f3 1 c\u1eb7p c\u1ea1nh song song. \u0110\u1ed1i v\u1edbi h\u00ecnh thang vu\u00f4ng th\u00ec \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c c\u00f3 2 g\u00f3c vu\u00f4ng.<\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch: S = 1\u20442 (a+b) x h<\/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\">a,b: \u0110\u1ed9 d\u00e0i 2 c\u1ea1nh song song<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">h: Chi\u1ec1u cao<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c c\u00f3 2 g\u00f3c vu\u00f4ng &#8211; H\u00ecnh thang vu\u00f4ng: S = 1\u20442 (a+b) x h<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S:\u00a0Di\u1ec7n t\u00edch h\u00ecnh thang<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a,b:\u00a0\u0110\u1ed9 d\u00e0i 2 c\u1ea1nh song song<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">h:\u00a0Chi\u1ec1u cao (l\u00e0 1 c\u1ea1nh b\u00ean c\u1ee7a h\u00ecnh thang)<\/p>\n<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-hinh-tu-giac-07.png\" alt=\"C\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c l\u00e0 h\u00ecnh thang. (\u1ea2nh: Internet)\" width=\"800\" height=\"375\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_cach_tinh_dien_tich_cua_hinh_tu_giac_khong_dung_cong_thuc\"><\/span>C\u00e1c c\u00e1ch t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c kh\u00f4ng d\u00f9ng c\u00f4ng th\u1ee9c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Ngo\u00e0i c\u00e1c c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch S t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t, b\u1ea1n c\u00f3 th\u1ec3 t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c m\u00e0 kh\u00f4ng d\u00f9ng c\u00f4ng th\u1ee9c b\u1eb1ng c\u00e1c quy t\u1eafc d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tinh_dien_tich_tu_giac_khi_biet_duong_cheo_chinh\"><\/span>T\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c khi bi\u1ebft \u0111\u01b0\u1eddng ch\u00e9o ch\u00ednh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li dir=\"ltr\">B\u01b0\u1edbc 1: V\u1ebd \u0111\u01b0\u1eddng ch\u00e9o ch\u00ednh c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c, t\u1ea1o th\u00e0nh hai tam gi\u00e1c.<\/li>\n<li dir=\"ltr\">B\u01b0\u1edbc 2: T\u00ednh di\u1ec7n t\u00edch c\u1ee7a hai tam gi\u00e1c b\u1eb1ng c\u00f4ng th\u1ee9c S = 0.5 x c\u1ea1nh a x c\u1ea1nh b x sin g\u00f3c gi\u1eefa ch\u00fang.<\/li>\n<li dir=\"ltr\">B\u01b0\u1edbc 3: T\u1ed5ng hai di\u1ec7n t\u00edch c\u1ee7a c\u00e1c tam gi\u00e1c l\u00e0 di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c.<\/li>\n<\/ul>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cach_tinh_dien_tich_cua_hinh_tu_giac_khi_biet_duong_cao\"><\/span>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c khi bi\u1ebft \u0111\u01b0\u1eddng cao<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li dir=\"ltr\">B\u01b0\u1edbc 1: V\u1ebd \u0111\u01b0\u1eddng cao c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c, t\u1ea1o th\u00e0nh hai tam gi\u00e1c.<\/li>\n<li dir=\"ltr\">B\u01b0\u1edbc 2: T\u00ednh di\u1ec7n t\u00edch c\u1ee7a hai tam gi\u00e1c b\u1eb1ng c\u00f4ng th\u1ee9c S = 0.5 x c\u1ea1nh x \u0111\u01b0\u1eddng cao t\u01b0\u01a1ng \u1ee9ng.<\/li>\n<li dir=\"ltr\">B\u01b0\u1edbc 3: T\u1ed5ng hai di\u1ec7n t\u00edch c\u1ee7a c\u00e1c tam gi\u00e1c l\u00e0 di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-hinh-tu-giac-08.jpg\" alt=\"C\u00e1c c\u00e1ch t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c kh\u00f4ng d\u00f9ng c\u00f4ng th\u1ee9c. (\u1ea2nh: Internet)\" width=\"800\" height=\"633\"><\/p>\n<p dir=\"ltr\">\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_dang_toan_tinh_dien_tich_tu_giac\"><\/span>C\u00e1c d\u1ea1ng to\u00e1n t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Th\u1ef1c ch\u1ea5t, trong to\u00e1n h\u1ecdc c\u00f3 r\u1ea5t nhi\u1ec1u d\u1ea1ng b\u00e0i t\u1eadp li\u00ean quan t\u1edbi c\u00e1ch t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c. Tuy nhi\u00ean, trong n\u1ed9i dung b\u00e0i vi\u1ebft n\u00e0y ch\u1ee7 y\u1ebfu t\u1eadp trung v\u00e0o ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n d\u00e0nh cho h\u1ecdc sinh c\u1ea5p 1 n\u00ean s\u1ebd bao g\u1ed3m m\u1ed9t s\u1ed1 d\u1ea1ng b\u00e0i t\u1eadp sau \u0111\u00e2y:<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-hinh-tu-giac-4.jpg\" alt=\"Trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n h\u1ecdc c\u1ea5p 1, c\u00f3 nhi\u1ec1u d\u1ea1ng b\u00e0i t\u1eadp v\u1ec1 h\u00ecnh t\u1ee9 gi\u00e1c. (\u1ea2nh: s\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_1_Tinh_dien_tich_cua_tu_giac_dac_biet_khi_cho_thong_tin_mot_canh_duong_cao\"><\/span>D\u1ea1ng 1: T\u00ednh di\u1ec7n t\u00edch c\u1ee7a t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t khi cho th\u00f4ng tin m\u1ed9t c\u1ea1nh, \u0111\u01b0\u1eddng cao<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u00e2y \u0111\u01b0\u1ee3c xem l\u00e0 d\u1ea1ng b\u00e0i t\u1eadp c\u01a1 b\u1ea3n, th\u01b0\u1eddng g\u1eb7p nh\u1ea5t. C\u1ee5 th\u1ec3 \u0111\u1ec1 b\u00e0i \u0111\u01b0a ra s\u1ebd t\u00ednh di\u1ec7n t\u00edch c\u1ee7a c\u00e1c h\u00ecnh t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t nh\u01b0 h\u00ecnh vu\u00f4ng, h\u00ecnh ch\u1eef nh\u1eadt, h\u00ecnh thang,&#8230; \u0110\u1ec3 gi\u1ea3i \u0111\u01b0\u1ee3c b\u00e0i t\u1eadp n\u00e0y, c\u00e1c em ch\u1ec9 c\u1ea7n \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh c\u1ee7a m\u1ed7i h\u00ecnh, thay c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u00e3 bi\u1ebft v\u00e0 t\u00ednh to\u00e1n theo m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: <em>N\u1ebfu chi\u1ec1u d\u00e0i c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 \u0111\u1ed9 d\u00e0i 5 cm v\u00e0 chi\u1ec1u r\u1ed9ng c\u00f3 \u0111\u1ed9 d\u00e0i 3 cm, th\u00ec di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 5 x 3 = 15 cm2.\u00a0<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_2_Tinh_canh_duong_cao_khi_biet_dien_tich_tu_giac\"><\/span>D\u1ea1ng 2: T\u00ednh c\u1ea1nh, \u0111\u01b0\u1eddng cao khi bi\u1ebft di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">V\u1edbi d\u1ea1ng b\u00e0i t\u1eadp n\u00e0y s\u1ebd ng\u01b0\u1ee3c l\u1ea1i so v\u1edbi d\u1ea1ng 1. Ch\u1ee7 y\u1ebfu \u0111\u1ec1 b\u00e0i s\u1ebd cho bi\u1ebft th\u00f4ng tin v\u1ec1 di\u1ec7n t\u00edch m\u1ed9t h\u00ecnh t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t n\u00e0o \u0111\u00f3, nhi\u1ec7m v\u1ee5 c\u1ee7a c\u00e1c em ch\u00ednh l\u00e0 t\u00ecm th\u00f4ng tin v\u1ec1 c\u1ea1nh ho\u1eb7c \u0111\u01b0\u1eddng cao c\u1ee7a h\u00ecnh t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u1ea3i b\u00e0i t\u1eadp, c\u00e1c em c\u0169ng s\u1ebd \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch c\u1ee7a c\u00e1c h\u00ecnh t\u1ee9 gi\u00e1c, t\u1eeb \u0111\u00f3 suy lu\u1eadn ra c\u00f4ng th\u1ee9c t\u00ednh c\u1ea1nh ho\u1eb7c chi\u1ec1u cao t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: Cho h\u00ecnh vu\u00f4ng ABCD, bi\u1ebft di\u1ec7n t\u00edch c\u1ee7a h\u00ednh l\u00e0 10cm2. H\u1ecfi \u0111\u1ed9 d\u00e0i c\u1ea1nh l\u00e0 bao nhi\u00eau?<\/em><\/p>\n<p dir=\"ltr\"><em>L\u1eddi gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng: S = a2 =&gt; a = S\/2 = 10\/2= 5cm.<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u00e1p s\u1ed1: C\u1ea1nh h\u00ecnh vu\u00f4ng = 5cm.<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_toan_lien_quan_toi_dien_tich_hinh_tu_giac_de_be_luyen_tap\"><\/span>B\u00e0i t\u1eadp to\u00e1n li\u00ean quan t\u1edbi di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c \u0111\u1ec3 b\u00e9 luy\u1ec7n t\u1eadp<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Sau khi \u0111\u00e3 n\u1eafm \u0111\u01b0\u1ee3c nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n li\u00ean quan t\u1edbi di\u1ec7n t\u00edch c\u1ee7a c\u00e1c h\u00ecnh t\u1ee9 gi\u00e1c, d\u01b0\u1edbi \u0111\u00e2y l\u00e0 t\u1ed5ng h\u1ee3p m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp \u0111\u1ec3 c\u00e1c em c\u00f9ng nhau luy\u1ec7n t\u1eadp nh\u00e9:<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 1: M\u1ed9t h\u00ecnh t\u1ee9 gi\u00e1c ABCD c\u00f3 c\u1ea1nh A = 80 \u0111\u1ed9, C = 110 \u0111\u1ed9. T\u00ecm di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c \u0111\u00f3.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 2: Cho h\u00ecnh t\u1ee9 gi\u00e1 ABCD, c\u00f3 c\u1ea1nh Ab = 3cm, BC = 5cm, CD = 2cm, DA = 6cm, g\u00f3c A = 110 \u0111\u1ed9, g\u00f3c C = 80 \u0111\u1ed9. T\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c ABCD?<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 3: Cho t\u1ee9 gi\u00e1c ABCD, c\u00f3 c\u1ea1nh AB = 3cm, c\u1ea1nh BC = 5cm, c\u1ea1nh CD = 2cm, c\u1ea1nh DA = 6cm. Cho g\u00f3c A = 110 \u0111\u1ed9, g\u00f3c C = 80 \u0111\u1ed9. T\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c ABCD.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 4: Cho h\u00ecnh thang ABCD, c\u00f3 c\u1ea1nh \u0111\u00e1y l\u00e0 AB v\u00e0 DC l\u1ea7n l\u01b0\u1ee3t b\u1eb1ng 3 v\u00e0 7cm, \u0111\u01b0\u1eddng cao k\u1ebb t\u1eeb A c\u1eaft DC t\u1ea1i H, AH = 5cm. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh thang ABCD.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 5: Cho t\u1ee9 gi\u00e1c n\u1ed9i ti\u1ebfp ABCD, c\u00f3 c\u1ea1nh AB = 3cm, c\u1ea1nh BC = 5cm, c\u1ea1nh CD = 2cm, c\u1ea1nh DA = 6cm. T\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c ABCD.\u00a0<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 6: M\u1ed9t h\u00ecnh thoi c\u00f3 \u0111\u1ed9 d\u00e0i c\u00e1c c\u1ea1nh l\u00e0 10 km v\u00e0 5 km. \u0110\u1ed9 d\u00e0i \u0111o\u1ea1n th\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi c\u1eb7p c\u1ea1nh 10 km l\u00e0 3 km. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh thoi.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 7: C\u00e1c \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a m\u1ed9t h\u00ecnh vu\u00f4ng c\u00f3 \u0111\u1ed9 d\u00e0i b\u1eb1ng nhau l\u00e0 10cm. Y\u00eau c\u1ea7u t\u00ednh di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 8: N\u1ebfu m\u1ed9t h\u00ecnh thang c\u00f3 hai c\u1ea1nh \u0111\u00e1y d\u00e0i l\u1ea7n l\u01b0\u1ee3t l\u00e0 7m v\u00e0 11m, \u0111\u01b0\u1eddng cao n\u1ed1i hai c\u1ea1nh \u0111\u00e1y d\u00e0i 2m. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh thang \u0111\u00f3.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 9: \u0110\u01b0\u1eddng trung b\u00ecnh c\u1ee7a h\u00ecnh thang trong v\u00ed d\u1ee5 tr\u00ean d\u00e0i 9m. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh thang.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 10: M\u1ed9t ng\u01b0\u1eddi th\u1ee3 ph\u1ea3i l\u00e0m c\u00e1c khung th\u00e9p h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 35cm, chi\u1ec1u r\u1ed9ng 30cm \u0111\u1ec3 l\u00e0m \u0111ai cho c\u1ed9t b\u00ea t\u00f4ng c\u1ed1t th\u00e9p. N\u1ebfu d\u00f9ng 260 m d\u00e2y th\u00e9p th\u00ec ng\u01b0\u1eddi \u0111\u00f3 s\u1ebd l\u00e0m \u0111\u01b0\u1ee3c bao nhi\u00eau khung th\u00e9p nh\u01b0 v\u1eady?<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 11: Trong m\u1ea3nh v\u01b0\u1eddn h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 8 m chi\u1ec1u r\u1ed9ng 5m, ng\u01b0\u1eddi ta tr\u1ed3ng hoa h\u1ed3ng trong m\u1ed9t m\u1ea3nh \u0111\u1ea5t h\u00ecnh thoi nh\u01b0 h\u00ecnh b\u00ean. N\u1ebfu m\u1ed7i m\u00e9t vu\u00f4ng tr\u1ed3ng 4 c\u00e2y hoa th\u00ec c\u1ea7n bao nhi\u00eau c\u00e2y hoa \u0111\u1ec3 tr\u1ed3ng tr\u00ean m\u1ea3nh \u0111\u1ea5t h\u00ecnh thoi \u0111\u00f3.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 12: M\u1ed9t khu v\u01b0\u1eddn h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 15m, chi\u1ec1u r\u1ed9ng 10 m nh\u01b0 h\u00ecnh d\u01b0\u1edbi, c\u1ed5ng v\u00e0o c\u00f3 \u0111\u1ed9 r\u1ed9ng b\u1eb1ng 1\/3 chi\u1ec1u d\u00e0i, ph\u1ea7n c\u00f2n l\u1ea1i l\u00e0 h\u00e0ng r\u00e0o. H\u1ecfi h\u00e0ng r\u00e0o c\u1ee7a khu v\u01b0\u1eddn d\u00e0i bao nhi\u00eau m\u00e9t?<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 13: T\u00ednh di\u1ec7n t\u00edch m\u1ea3nh \u0111\u1ea5t h\u00ecnh thang ABCD nh\u01b0 h\u00ecnh d\u01b0\u1edbi, bi\u1ebft AB = 10 m; DC = 25 m v\u00e0 h\u00ecnh ch\u1eef nh\u1eadt ABED c\u00f3 di\u1ec7n t\u00edch l\u00e0 150m2.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 14: M\u1ed9t gia \u0111\u00ecnh d\u1ef1 \u0111\u1ecbnh mua g\u1ea1ch men lo\u1ea1i h\u00ecnh vu\u00f4ng c\u1ea1nh 30cm \u0111\u1ec3 l\u00e1t n\u1ec1n c\u1ee7a c\u0103n ph\u00f2ng h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u r\u1ed9ng 3 m, chi\u1ec1u d\u00e0i 9 m. T\u00ednh s\u1ed1 vi\u00ean g\u1ea1ch c\u1ea7n l\u00e1t c\u0103n ph\u00f2ng \u0111\u00f3.<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 15: T\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt ABCD c\u00f3 AB = 4cm, BC = 6cm\u00a0<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bi_quyet_giup_be_hoc_ghi_nho_kien_thuc_dien_tich_tu_giac_hieu_qua\"><\/span>B\u00ed quy\u1ebft gi\u00fap b\u00e9 h\u1ecdc, ghi nh\u1edb ki\u1ebfn th\u1ee9c di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Tr\u00ean th\u1ef1c t\u1ebf, c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ea5t nhi\u1ec1u trong c\u00e1c l\u0129nh v\u1ef1c, \u0111i\u1ec3n h\u00ecnh nh\u01b0 t\u00ednh to\u00e1n trong thi\u1ebft k\u1ebf, thi c\u00f4ng, x\u00e2y d\u1ef1ng, \u0111\u1ea5t \u0111ai&#8230; v\u1edbi nh\u1eefng h\u00ecnh \u1ea3nh, d\u1ef1 \u00e1n c\u00f3 ki\u1ec3u h\u00ecnh t\u1ee9 gi\u00e1c. V\u00ec v\u1eady, \u0111\u1ec3 h\u1ecdc v\u00e0 \u1ee9ng d\u1ee5ng t\u1ed1t c\u00e1ch t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c, ba m\u1eb9 n\u00ean \u00e1p d\u1ee5ng nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p sau \u0111\u00e2y:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dam_bao_be_nam_vung_kien_thuc_co_ban_cua_hinh_tu_giac\"><\/span>\u0110\u1ea3m b\u1ea3o b\u00e9 n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n c\u1ee7a h\u00ecnh t\u1ee9 gi\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u1ea3i to\u00e1n v\u1ec1 di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c ch\u00ednh x\u00e1c, \u0111\u00f2i h\u1ecfi b\u00e9 ph\u1ea3i n\u1eafm v\u1eefng \u0111\u01b0\u1ee3c c\u00e1c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n li\u00ean quan nh\u01b0\u00a0h\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 g\u00ec? C\u00e1c lo\u1ea1i h\u00ecnh t\u1ee9 gi\u00e1c, c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch,\u00a0chu vi h\u00ecnh t\u1ee9 gi\u00e1c, c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp,&#8230;\u00a0<\/p>\n<p dir=\"ltr\">B\u1edfi v\u00ec khi n\u1eafm v\u1eefng \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n n\u00e0y, b\u00e9 m\u1edbi c\u00f3 th\u1ec3 gi\u1ea3i \u0111\u01b0\u1ee3c c\u00e1c b\u00e0i t\u1eadp m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c nh\u1ea5t.<\/p>\n<p dir=\"ltr\">V\u1eady n\u00ean, b\u1ed1 m\u1eb9 n\u00ean th\u01b0\u1eddng xuy\u00ean ki\u1ec3m tra ki\u1ebfn th\u1ee9c l\u00fd thuy\u1ebft c\u1ee7a b\u00e9, \u0111\u1ec3 bi\u1ebft con c\u00f3 ghi nh\u1edb th\u00f4ng tin hay ph\u1ea7n ki\u1ebfn th\u1ee9c n\u00e0o b\u00e9 \u0111ang b\u1ecb y\u1ebfu ho\u1eb7c qu\u00ean, \u0111\u1ec3 ti\u1ebfn h\u00e0nh c\u1ee7ng c\u1ed1 l\u1ea1i k\u1ecbp th\u1eddi.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Thuc_hanh_thuong_xuyen_la_yeu_to_quan_trong\"><\/span>Th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u201cH\u1ecdc \u0111i \u0111\u00f4i v\u1edbi h\u00e0nh\u201d l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh t\u1edbi t\u00ednh th\u00e0nh c\u00f4ng khi l\u00e0m vi\u1ec7c, c\u0169ng nh\u01b0 h\u1ecdc t\u1eadp. Vi\u1ec7c th\u1ef1c h\u00e0nh \u1edf \u0111\u00e2y c\u00f3 th\u1ec3 l\u00e0 b\u1ed1 m\u1eb9\u00a0c\u00f9ng b\u00e9 l\u00e0m c\u00e1c b\u00e0i t\u1eadp trong sgk, luy\u1ec7n \u0111\u1ec1 online, tham kh\u1ea3o c\u00e1c \u0111\u1ec1 thi, t\u1ef1 t\u1ed5 ch\u1ee9c c\u00e1c cu\u1ed9c thi nh\u1ecf, h\u1ecdc to\u00e1n th\u00f4ng qua tr\u00f2 ch\u01a1i, \u1ee9ng d\u1ee5ng b\u00e0i to\u00e1n trong th\u1ef1c t\u1ebf,..<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-hinh-tu-giac-6.jpg\" alt=\"N\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c v\u00e0 th\u1ef1c h\u00e0nh r\u1ea5t quan tr\u1ecdng. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Khi \u0111\u01b0\u1ee3c th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean b\u00e9 s\u1ebd d\u1ec5 d\u00e0ng ghi nh\u1edb, c\u00f3 s\u1ef1 h\u1ee9ng th\u00fa h\u01a1n khi h\u1ecdc t\u1eadp v\u00e0 bi\u1ebft \u0111\u01b0\u1ee3c ph\u1ea7n n\u00e0o m\u00ecnh c\u00f2n y\u1ebfu \u0111\u1ec3 c\u1ea3i thi\u1ec7n nhanh ch\u00f3ng.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Doc_ky_de_bai_toan_dua_ra\"><\/span>\u0110\u1ecdc k\u1ef9 \u0111\u1ec1 b\u00e0i to\u00e1n \u0111\u01b0a ra<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Trong qu\u00e1 tr\u00ecnh gi\u1ea3i b\u00e0i t\u1eadp to\u00e1n n\u00f3i chung, to\u00e1n t\u00ednh di\u1ec7n t\u00edch t\u1ee9 gi\u00e1c n\u00f3i ri\u00eang th\u00ec b\u1ed1 m\u1eb9 n\u00ean\u00a0y\u00eau c\u1ea7u tr\u1ebb \u0111\u1ecdc k\u1ef9 \u0111\u1ec1 b\u00e0i \u0111\u01b0a ra.<\/p>\n<p dir=\"ltr\">B\u1edfi v\u00ec th\u00f4ng qua \u0111\u1ec1 b\u00e0i s\u1ebd bi\u1ebft \u0111\u01b0\u1ee3c b\u00e0i to\u00e1n cho nh\u1eefng d\u1eef ki\u1ec7n n\u00e0o, y\u00eau c\u1ea7u t\u00ednh to\u00e1n g\u00ec? N\u1ebfu \u0111\u1ecdc sai \u0111\u1ec1 th\u00ec xem nh\u01b0 vi\u1ec7c t\u00ednh to\u00e1n s\u1ebd c\u00f4ng c\u1ed1c, sai ho\u00e0n to\u00e0n.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tao_su_hung_thu_khi_hoc_toan_voi_be_cung_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_Math\"><\/span>T\u1ea1o s\u1ef1 h\u1ee9ng th\u00fa khi h\u1ecdc to\u00e1n v\u1edbi b\u00e9 c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ed1i v\u1edbi h\u1ecdc sinh, to\u00e1n h\u1ecdc l\u00e0 b\u1ed9 m\u00f4n kh\u00e1 kh\u00f3, c\u00f3 nhi\u1ec1u ki\u1ebfn th\u1ee9c. \u0110\u1eb7c bi\u1ec7t l\u00e0 khi h\u1ecdc h\u00ecnh h\u1ecdc m\u1ee9c \u0111\u1ed9 kh\u00f3 cao v\u00e0 t\u00ednh nh\u00e0m ch\u00e1n c\u0169ng cao. Ch\u00ednh v\u00ec v\u1eady, \u0111\u00f2i h\u1ecfi b\u1ed1 m\u1eb9 c\u1ea7n ph\u1ea3i c\u00f3 ph\u01b0\u01a1ng ph\u00e1p d\u1ea1y h\u1ecdc ph\u00f9 h\u1ee3p \u0111\u1ec3 c\u00f3 th\u1ec3 t\u1ea1o \u0111\u01b0\u1ee3c s\u1ef1 h\u1ee9ng th\u00fa cho b\u00e9, nh\u01b0 v\u1eady con m\u1edbi hi\u1ec3u, ghi nh\u1edb v\u00e0 th\u1ef1c h\u00e0nh hi\u1ec7u qu\u1ea3.<\/p>\n<p dir=\"ltr\">Tuy nhi\u00ean, n\u1ebfu b\u1ed1 m\u1eb9 kh\u00f4ng c\u00f3 nhi\u1ec1u th\u1eddi gian trong vi\u1ec7c h\u1ed7 tr\u1ee3 con h\u1ecdc to\u00e1n, c\u0169ng nh\u01b0 kh\u00f4ng c\u00f3 kinh nghi\u1ec7m, ki\u1ebfn th\u1ee9c v\u00e0 k\u1ef9 n\u0103ng d\u1ea1y b\u00e9,&#8230; c\u00f9ng nhi\u1ec1u n\u1ed7i lo l\u1eafng kh\u00e1c th\u00ec c\u00f3 th\u1ec3 ch\u1ecdn Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math \u0111\u1ec3 \u0111\u1ed3ng h\u00e0nh c\u00f9ng v\u1edbi b\u00e9.<\/p>\n<p dir=\"ltr\">Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn \u1ee9ng d\u1ee5ng d\u1ea1y h\u1ecdc to\u00e1n ti\u1ebfng Anh thu\u1ed9c top \u0111\u1ea7u t\u1ea1i Vi\u1ec7t Nam hi\u1ec7n nay, \u0111\u01b0\u1ee3c h\u00e0ng tri\u1ec7u ph\u1ee5 huynh tin t\u01b0\u1edfng l\u1ef1a ch\u1ecdn \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u qu\u1ea3 h\u1ecdc to\u00e1n c\u1ee7a tr\u1ebb.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-hinh-tu-giac-5.jpg\" alt=\"C\u00e1c c\u1ea5p \u0111\u1ed9 h\u1ecdc c\u00f9ng Shining Home - Gia \u0111\u00ecnh Anh Ng\u1eef Math. (\u1ea2nh: Shining Home - Gia \u0111\u00ecnh Anh Ng\u1eef)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">\u0110i\u1ec3m \u0111\u1eb7c bi\u1ec7t c\u1ee7a \u1ee9ng d\u1ee5ng n\u00e0y ch\u00ednh l\u00e0 d\u1ea1y b\u00e9 h\u1ecdc to\u00e1n d\u1ef1a tr\u00ean nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau, t\u1eeb d\u1ea1y h\u1ecdc th\u00f4ng qua ph\u01b0\u01a1ng ph\u00e1p t\u00edch c\u1ef1c gi\u00fap b\u00e9 hi\u1ec3u g\u1ed1c r\u1ec5 b\u00e0i to\u00e1n v\u00e0 t\u1ef1 gi\u1ea3i quy\u1ebft, h\u1ecdc th\u00f4ng qua tr\u00f2 ch\u01a1i gi\u00fap t\u1ea1o s\u1ef1 h\u1ee9ng th\u00fa v\u00e0 ghi nh\u1edb t\u1ed1t, c\u00f9ng v\u1edbi h\u1ecdc to\u00e1n d\u1ef1a v\u00e0o s\u00e1ch b\u1ed5 tr\u1ee3 gi\u00fap b\u00e9 gia t\u0103ng k\u1ef9 n\u0103ng v\u1eadn \u0111\u1ed9ng tinh v\u00e0 v\u1eadn \u0111\u1ed9ng th\u00f4 th\u00f4ng qua vi\u1ec7c gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i to\u00e1n trong th\u1ef1c t\u1ebf.<\/p>\n<p dir=\"ltr\">C\u1ee5 th\u1ec3, \u1edf m\u1ed7i b\u00e0i h\u1ecdc c\u1ee7a Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math b\u00e9 s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc th\u00f4ng qua 3 ho\u1ea1t \u0111\u1ed9ng ch\u00ednh:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Xem video h\u01b0\u1edbng d\u1eabn: \u0111\u00e2y s\u1ebd l\u00e0 \u0111o\u1ea1n video cung c\u1ea5p c\u00e1c ki\u1ebfn th\u1ee9c li\u00ean quan \u0111\u1ebfn chuy\u00ean \u0111\u1ec1 to\u00e1n, ch\u1ee7 \u0111\u1ec1 ri\u00eang t\u1eeb kh\u00e1i ni\u1ec7m, c\u00e1ch gi\u1ea3i b\u00e0i t\u1eadp th\u00f4ng qua h\u00ecnh \u1ea3nh minh h\u1ecda r\u00f5 r\u00e0ng \u0111\u1ec3 b\u00e9 d\u1ec5 d\u00e0ng ti\u1ebfp thu v\u00e0 ghi nh\u1edb.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Th\u1ef1c h\u00e0nh: Sau khi b\u00e9 \u0111\u00e3 n\u1eafm v\u1eefng \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n, con s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c h\u00e0nh v\u1edbi 3 ho\u1ea1t \u0111\u1ed9ng kh\u00e1c nhau bao g\u1ed3m: nh\u1eadn bi\u1ebft th\u00f4ng hi\u1ec3u, b\u00e0i t\u1eadp v\u1eadn d\u1ee5ng, v\u00e0 vi\u1ec7c \u00f4n t\u1eadp l\u1ea1i 2 d\u1ea1ng b\u00e0i t\u1eadp tr\u00ean.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">L\u00e0m b\u00e0i t\u1eadp: B\u00e9 ti\u1ebfn h\u00e0nh l\u00e0m b\u00e0i t\u1eadp b\u1ed5 tr\u1ee3 trong s\u00e1ch Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef math Workbook m\u00e0 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef cung c\u1ea5p.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">H\u1ee9a h\u1eb9n, v\u1edbi ph\u01b0\u01a1ng ph\u00e1p d\u1ea1y h\u1ecdc t\u00edch c\u1ef1c theo ti\u00eau chu\u1ea9n M\u1ef9, \u0111a d\u1ea1ng chuy\u00ean \u0111\u1ec1 to\u00e1n h\u1ecdc bao g\u1ed3m c\u1ea3 h\u00ecnh h\u1ecdc, k\u1ebft h\u1ee3p v\u1edbi h\u01a1n 10.000 ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u00e1c s\u1ebd gi\u00fap b\u00e9 nhanh ch\u00f3ng ti\u1ebfp thu ki\u1ebfn th\u1ee9c, c\u0169ng nh\u01b0 ghi nh\u1edb, \u00e1p d\u1ee5ng v\u00e0 ph\u00e1t huy kh\u1ea3 n\u0103ng t\u01b0 duy to\u00e1n h\u1ecdc v\u00e0 ngo\u1ea1i ng\u1eef t\u1ef1 nhi\u00ean t\u1ed1t nh\u1ea5t.<\/p>\n<p dir=\"ltr\">T\u1ea3i Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math cho \u0111i\u1ec7n tho\u1ea1i Android<\/p>\n<p dir=\"ltr\">T\u1ea3i Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math cho \u0111i\u1ec7n tho\u1ea1i iOS<\/p>\n<\/p>\n<p dir=\"ltr\">Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng th\u00f4ng tin v\u1ec1 c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c. \u0110\u00e2y \u0111\u01b0\u1ee3c xem l\u00e0 m\u1ed9t ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n trong to\u00e1n h\u1ecdc, \u0111\u00f2i h\u1ecfi c\u00e1c b\u00e9 c\u1ea7n n\u1eafm r\u00f5 v\u00e0 \u1ee9ng d\u1ee5ng th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 gi\u00fap n\u00e2ng cao hi\u1ec7u qu\u1ea3 h\u1ecdc t\u1eadp t\u1ed1t h\u01a1n.<\/p>\n<p>                                    \u00a0\u00a0T\u00e0i li\u1ec7u tham kh\u1ea3o<\/p>\n<p>Area Of Quadrilateral<\/p>\n<p>https:\/\/byjus.com\/maths\/area-of-quadrilateral\/#:~:text=Area%20of%20quadrilateral%20%3D%20(%C2%BD),from%20the%20remaining%20two%20vertices.<\/p>\n<p>Area of Quadrilateral<\/p>\n<p>https:\/\/www.cuemath.com\/measurement\/area-of-quadrilateral\/<\/p>\n<p>Area of a Quadrilateral \u2013 Definition with Examples<\/p>\n<p>https:\/\/www.splashlearn.com\/math-vocabulary\/measurements\/area-of-a-quadrilateral<\/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>C\u00e1ch t\u00ednh di\u1ec7n t\u00edch h\u00ecnh t\u1ee9 gi\u00e1c l\u00e0 m\u1ed9t ph\u1ea7n ki\u1ebfn th\u1ee9c to\u00e1n h\u00ecnh c\u1ea7n n\u1eafm v\u1eefng. Nh\u01b0ng v\u00ec h\u00ecnh t\u1ee9 gi\u00e1c c\u00f3 nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau, n\u00ean \u0111\u1ec3 gi\u00fap c\u00e1c em h\u1ecdc v\u00e0 ghi nh\u1edb ki\u1ebfn th\u1ee9c m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, h\u00e3y c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef tham kh\u1ea3o ngay b\u00e0i&#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-13997","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/13997","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=13997"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/13997\/revisions"}],"predecessor-version":[{"id":16755,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/13997\/revisions\/16755"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=13997"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=13997"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=13997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}