{"id":16474,"date":"2025-07-03T14:15:03","date_gmt":"2025-07-03T07:15:03","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=16474"},"modified":"2025-07-03T21:35:18","modified_gmt":"2025-07-03T14:35:18","slug":"cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/","title":{"rendered":"C\u00e1ch t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh \u0111\u1ea7y \u0111\u1ee7 chi ti\u1ebft nh\u1ea5t"},"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\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Hinh_binh_hanh_la_gi\" >H\u00ecnh b\u00ecnh h\u00e0nh 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\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Tinh_chat_hinh_binh_hanh\" >T\u00ednh ch\u1ea5t h\u00ecnh b\u00ecnh h\u00e0nh<\/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\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#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-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Mot_so_cong_thuc_khac_ve_hinh_binh_hanh\" >M\u1ed9t s\u1ed1 c\u00f4ng th\u1ee9c kh\u00e1c v\u1ec1 h\u00ecnh b\u00ecnh h\u00e0nh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Cac_cong_thuc_tinh_dien_tich_hinh_binh_hanh_trong_truong_hop_dac_biet\" >C\u00e1c c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh trong tr\u01b0\u1eddng h\u1ee3p \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-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Tinh_dien_tich_hinh_binh_hanh_khi_chi_biet_duong_cheo\" >T\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh khi ch\u1ec9 bi\u1ebft \u0111\u01b0\u1eddng ch\u00e9o<\/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\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Tinh_dien_tich_hinh_binh_hanh_khi_chi_biet_do_dai_hai_canh_ke_va_goc_giua_hai_canh_do\" >T\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh khi ch\u1ec9 bi\u1ebft \u0111\u1ed9 d\u00e0i hai c\u1ea1nh k\u1ec1 v\u00e0 g\u00f3c gi\u1eefa hai c\u1ea1nh \u0111\u00f3<\/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\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Nhung_truong_hop_dac_biet_khac\" >Nh\u1eefng tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t kh\u00e1c<\/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\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Mot_so_dang_bai_tap_tinh_dien_tich_hinh_binh_hanh_pho_bien\" >M\u1ed9t s\u1ed1 d\u1ea1ng b\u00e0i t\u1eadp t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh ph\u1ed5 bi\u1ebfn<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Dang_1_Tinh_dien_tich_khi_biet_do_dai_day_va_chieu_cao\" >D\u1ea1ng 1: T\u00ednh di\u1ec7n t\u00edch khi bi\u1ebft \u0111\u1ed9 d\u00e0i \u0111\u00e1y v\u00e0 chi\u1ec1u cao<\/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\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Dang_2_Tinh_do_dai_day_khi_biet_dien_tich_va_chieu_cao_hinh_binh_hanh\" >D\u1ea1ng 2: T\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y khi bi\u1ebft di\u1ec7n t\u00edch v\u00e0 chi\u1ec1u cao 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-12\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Dang_3_Tinh_chieu_cao_khi_biet_dien_tich_va_do_dai_day_hinh_binh_hanh\" >D\u1ea1ng 3: T\u00ednh chi\u1ec1u cao khi bi\u1ebft di\u1ec7n t\u00edch v\u00e0 \u0111\u1ed9 d\u00e0i \u0111\u00e1y 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-13\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Dang_4_Bai_tap_tong_hop\" >D\u1ea1ng 4: B\u00e0i t\u1eadp t\u1ed5ng h\u1ee3p<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Bai_tap_ve_dien_tich_cua_hinh_binh_hanh_de_be_tu_luyen\" >B\u00e0i t\u1eadp v\u1ec1 di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh \u0111\u1ec3 b\u00e9 t\u1ef1 luy\u1ec7n<\/a><\/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\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Meo_giup_be_lam_bai_tap_tinh_dien_tich_hinh_binh_hanh_hieu_qua\" >M\u1eb9o gi\u00fap b\u00e9 l\u00e0m b\u00e0i t\u1eadp t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh 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-16\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Xay_dung_niem_yeu_thich_hoc_toan_cho_tre_cung_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_Math\" >X\u00e2y d\u1ef1ng ni\u1ec1m y\u00eau th\u00edch h\u1ecdc to\u00e1n cho tr\u1ebb c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math<\/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\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Nam_chac_ly_thuyet_cong_thuc_tinh_dien_tich_hinh_binh_hanh\" >N\u1eafm ch\u1eafc l\u00fd thuy\u1ebft, 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-18\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Thuc_hanh_thuong_xuyen_la_dieu_quan_trong\" >Th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Hoc_cong_thuc_tinh_dien_tich_cua_hinh_binh_hanh_qua_tho\" >H\u1ecdc c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh qua th\u01a1<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Mot_so_luu_y_khi_tinh_dien_tich_cua_hinh_binh_hanh\" >M\u1ed9t s\u1ed1 l\u01b0u \u00fd khi t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-dien-tich-hinh-binh-hanh-day-du-chi-tiet-nhat\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 ki\u1ebfn th\u1ee9c trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n h\u1ecdc l\u1edbp 4 m\u00e0 c\u00e1c em c\u1ea7n ph\u1ea3i n\u1eafm r\u00f5. V\u1eady n\u00ean, trong n\u1ed9i dung b\u00e0i vi\u1ebft sau \u0111\u00e2y Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd t\u1ed5ng h\u1ee3p, ph\u00e2n t\u00edch \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ec3 c\u00e1c em n\u1eafm r\u00f5.<\/p>\n<p>                                                                    <img decoding=\"async\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img_default\/monkey3.png\" alt=\"\"><\/p>\n<p class=\"title\">H\u00e0ng tri\u1ec7u tr\u1ebb em \u0111\u00e3 ph\u00e1t tri\u1ec3n kh\u1ea3 n\u0103ng ng\u00f4n ng\u1eef c\u1ee7a m\u00ecnh th\u00f4ng qua c\u00e1c \u1ee9ng d\u1ee5ng h\u1ecdc t\u1eadp c\u1ee7a Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef<\/p>\n<p class=\"description\">\u0110\u0103ng k\u00fd ngay \u0111\u1ec3 \u0111\u01b0\u1ee3c Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed v\u1ec1 s\u1ea3n ph\u1ea9m v\u00e0 l\u1ed9 tr\u00ecnh h\u1ecdc cho con.<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra l\u1ea1i h\u1ecd t\u00ean<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra l\u1ea1i S\u0110T<\/p>\n<p>                                                                                Th\u00e0nh th\u1ea1o 2.000+ t\u1eeb &amp; 6.000 c\u00e2u ti\u1ebfng anh<br \/>\n                                                                                Ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n 4 k\u1ef9 n\u0103ng ti\u1ebfng anh<br \/>\n                                                                                Gi\u1ecfi To\u00e1n &#8211; ti\u1ebfng Anh theo ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7n \u0111\u1ea1i<br \/>\n                                                                                Ph\u00e1t tri\u1ec3n EQ &amp; kh\u1ea3 n\u0103ng ti\u1ebfng Vi\u1ec7t<\/p>\n<p>                                                                                *B\u1ea1n ch\u01b0a ch\u1ecdn m\u1ee5c n\u00e0o!<\/p>\n<p>                                                                    \u0110\u0103ng K\u00fd T\u01b0 V\u1ea5n Mi\u1ec5n Ph\u00ed<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Hinh_binh_hanh_la_gi\"><\/span>H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 m\u1ed9t lo\u1ea1i h\u00ecnh h\u1ecdc hai chi\u1ec1u c\u00f3 b\u1ed1n c\u1ea1nh song song v\u00e0 b\u1eb1ng nhau, v\u00e0 c\u00f3 hai c\u1eb7p g\u00f3c \u0111\u1ed1i di\u1ec7n b\u1eb1ng nhau. N\u00f3 c\u0169ng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 h\u00ecnh thang \u0111\u1ec1u.<\/p>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dien-tich-hinh-binh-hanh-oo.jpg\" alt=\"Kh\u00e1i ni\u1ec7m h\u00ecnh b\u00ecnh h\u00e0nh. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"100%\"><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tinh_chat_hinh_binh_hanh\"><\/span>T\u00ednh ch\u1ea5t h\u00ecnh b\u00ecnh h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>H\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t \u0111\u00e1ng ch\u00fa \u00fd, bao g\u1ed3m:<\/p>\n<ul>\n<li>Hai \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh c\u1eaft nhau \u1edf m\u1ed9t \u0111i\u1ec3m gi\u1eefa c\u1ee7a ch\u00fang v\u00e0 chia \u0111\u00f4i h\u00ecnh b\u00ecnh h\u00e0nh th\u00e0nh hai tam gi\u00e1c \u0111\u1ed3ng d\u1ea1ng.<\/li>\n<li>Hai c\u1ea1nh k\u1ec1 nhau v\u00e0 hai g\u00f3c t\u1ea1i m\u1ed9t \u0111\u1ec9nh c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh b\u1eb1ng nhau.<\/li>\n<li>T\u1ed5ng \u0111\u1ed9 d\u00e0i hai \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh b\u1eb1ng t\u1ed5ng \u0111\u1ed9 d\u00e0i b\u1ed1n c\u1ea1nh c\u1ee7a n\u00f3.<\/li>\n<\/ul>\n<h2 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><\/h2>\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.<\/p>\n<p dir=\"ltr\">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 x 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>L\u01b0u \u00fd: Di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i b\u00ecnh ph\u01b0\u01a1ng, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u00e9t vu\u00f4ng (m\u00b2), centimet vu\u00f4ng (cm\u00b2), millimet vu\u00f4ng (mm\u00b2),&#8230;<\/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-binh-hanh-1.jpg\" alt=\"C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: C\u00f3 m\u1ed9t h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 chi\u1ec1u d\u00e0i c\u1ea1nh \u0111\u00e1y CD = 10 cm v\u00e0 chi\u1ec1u cao n\u1ed1i t\u1eeb \u0111\u1ec9nh A xu\u1ed1ng c\u1ea1nh CD d\u00e0i 7 cm. H\u1ecfi di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh ABCD b\u1eb1ng bao nhi\u00eau?<\/em><\/p>\n<p dir=\"ltr\"><em>Gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>D\u1ef1a v\u00e0o c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh, ta \u00e1p d\u1ee5ng v\u00e0o b\u00e0i to\u00e1n nh\u01b0 sau:<\/em><\/p>\n<p dir=\"ltr\"><em>Chi\u1ec1u cao c\u1ea1nh \u0111\u00e1y CD (a) b\u1eb1ng 10cm, chi\u1ec1u cao n\u1ed1i t\u1eeb \u0111\u00e1y xu\u1ed1ng (h) b\u1eb1ng 7. L\u00fac n\u00e0y di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh ABCD s\u1ebd l\u00e0<\/em><\/p>\n<p dir=\"ltr\"><em>S = a x h = 10 x 7 = 70 (cm2).<\/em><\/p>\n<p dir=\"ltr\">Ngo\u00e0i ra, c\u00f2n c\u00f3 m\u1ed9t s\u1ed1 c\u00f4ng th\u1ee9c kh\u00e1c \u0111\u1ec3 t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh, nh\u01b0ng \u0111\u1ec1u d\u1ef1a tr\u00ean c\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n l\u00e0 S = a x h. C\u1ee5 th\u1ec3 nh\u01b0:<\/p>\n<p dir=\"ltr\">(1) C\u00f4ng th\u1ee9c d\u1ef1a tr\u00ean t\u00ednh ch\u1ea5t &#8220;Hai \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh c\u1eaft nhau t\u1ea1i m\u1ed9t \u0111i\u1ec3m v\u00e0 chia nhau theo t\u1ec9 l\u1ec7 2:1&#8221;<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">S = 1\/2 x (d1 + d2) x h<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3: d1 v\u00e0 d2 l\u00e0 \u0111\u1ed9 d\u00e0i hai \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<\/p>\n<p dir=\"ltr\">(2) C\u00f4ng th\u1ee9c d\u1ef1a tr\u00ean t\u00ednh ch\u1ea5t &#8220;Chu vi h\u00ecnh b\u00ecnh h\u00e0nh b\u1eb1ng 2 x (a + h)&#8221;<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">S = 1\/2 x P x h<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3: P l\u00e0 chu vi h\u00ecnh b\u00ecnh h\u00e0nh<\/p>\n<p dir=\"ltr\">(3) C\u00f4ng th\u1ee9c d\u1ef1a tr\u00ean t\u00ednh ch\u1ea5t &#8220;Hai c\u1ea1nh k\u1ec1 c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh t\u1ea1o th\u00e0nh m\u1ed9t g\u00f3c \u03b1, v\u00e0 di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh b\u1eb1ng t\u00edch c\u1ee7a hai c\u1ea1nh \u0111\u00f3 nh\u00e2n v\u1edbi sin c\u1ee7a g\u00f3c \u03b1&#8221;<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">S = b x c x sin(\u03b1)<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3: <\/p>\n<ul>\n<li dir=\"ltr\">b l\u00e0 \u0111\u1ed9 d\u00e0i m\u1ed9t c\u1ea1nh<\/li>\n<li dir=\"ltr\">c l\u00e0 \u0111\u1ed9 d\u00e0i c\u1ea1nh k\u1ec1 \u1ee9ng v\u1edbi g\u00f3c \u03b1 (g\u00f3c gi\u1eefa hai c\u1ea1nh)<\/li>\n<li dir=\"ltr\">sin(\u03b1) l\u00e0 sin c\u1ee7a g\u00f3c \u03b1<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_cong_thuc_khac_ve_hinh_binh_hanh\"><\/span>M\u1ed9t s\u1ed1 c\u00f4ng th\u1ee9c kh\u00e1c v\u1ec1 h\u00ecnh b\u00ecnh h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">1. T\u00ednh chu vi h\u00ecnh b\u00ecnh h\u00e0nh<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">C = (a + b) x 2<\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><em>Chu vi = 2 \u00d7 (C\u1ea1nh 1 + C\u1ea1nh 2)<\/em><\/p>\n<p dir=\"ltr\">2. T\u00ednh \u0111\u01b0\u1eddng cao h\u00ecnh b\u00ecnh h\u00e0nh<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">h = \u0111\u01b0\u1eddng ch\u00e9o\/ a<\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><em>\u0110\u01b0\u1eddng cao = (\u0110\u01b0\u1eddng ch\u00e9o 1 ho\u1eb7c \u0110\u01b0\u1eddng ch\u00e9o 2) \/ C\u1ea1nh<\/em><\/p>\n<p dir=\"ltr\">3. T\u00ednh \u0111\u01b0\u1eddng ch\u00e9o h\u00ecnh b\u00ecnh h\u00e0nh<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">\u0110\u01b0\u1eddng ch\u00e9o = \u221a(a^2 + b^2)<\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><em>\u0110\u01b0\u1eddng ch\u00e9o = \u221a(C\u1ea1nh^2 + C\u1ea1nh^2)<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_cong_thuc_tinh_dien_tich_hinh_binh_hanh_trong_truong_hop_dac_biet\"><\/span>C\u00e1c c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh trong tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh trong t\u1eebng tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t m\u00e0 b\u1ea1n n\u00ean bi\u1ebft.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tinh_dien_tich_hinh_binh_hanh_khi_chi_biet_duong_cheo\"><\/span>T\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh khi ch\u1ec9 bi\u1ebft \u0111\u01b0\u1eddng ch\u00e9o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Khi ch\u1ec9 bi\u1ebft \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, ch\u00fang ta c\u00f3 th\u1ec3 t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c sau:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">S = 1\/2 x (d1 + d2) x h<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">d1 v\u00e0 d2 l\u00e0 \u0111\u1ed9 d\u00e0i hai \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<\/li>\n<li dir=\"ltr\">h l\u00e0 chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<\/li>\n<\/ul>\n<p dir=\"ltr\">Tuy nhi\u00ean, c\u00f4ng th\u1ee9c n\u00e0y ch\u1ec9 \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c khi hai \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh kh\u00f4ng song song ho\u1eb7c vu\u00f4ng g\u00f3c v\u1edbi nhau. N\u1ebfu hai \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh song song ho\u1eb7c vu\u00f4ng g\u00f3c v\u1edbi nhau, th\u00ec di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 kh\u00f4ng x\u00e1c \u0111\u1ecbnh.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tinh_dien_tich_hinh_binh_hanh_khi_chi_biet_do_dai_hai_canh_ke_va_goc_giua_hai_canh_do\"><\/span>T\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh khi ch\u1ec9 bi\u1ebft \u0111\u1ed9 d\u00e0i hai c\u1ea1nh k\u1ec1 v\u00e0 g\u00f3c gi\u1eefa hai c\u1ea1nh \u0111\u00f3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Khi ch\u1ec9 bi\u1ebft \u0111\u1ed9 d\u00e0i hai c\u1ea1nh k\u1ec1 v\u00e0 g\u00f3c gi\u1eefa hai c\u1ea1nh \u0111\u00f3, ch\u00fang ta c\u00f3 th\u1ec3 t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c sau:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">S = b x c x sin(\u03b1)<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">b v\u00e0 c l\u00e0 \u0111\u1ed9 d\u00e0i hai c\u1ea1nh k\u1ec1 c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<\/li>\n<li dir=\"ltr\">\u03b1 l\u00e0 g\u00f3c gi\u1eefa hai c\u1ea1nh b v\u00e0 c<\/li>\n<li dir=\"ltr\">sin(\u03b1) l\u00e0 sin c\u1ee7a g\u00f3c \u03b1<\/li>\n<\/ul>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Nhung_truong_hop_dac_biet_khac\"><\/span>Nh\u1eefng tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t kh\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li dir=\"ltr\">N\u1ebfu bi\u1ebft h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 h\u00ecnh vu\u00f4ng, th\u00ec di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0: S = a\u00b2. Trong \u0111\u00f3, a l\u00e0 \u0111\u1ed9 d\u00e0i c\u1ea1nh c\u1ee7a h\u00ecnh vu\u00f4ng.<\/li>\n<li dir=\"ltr\">N\u1ebfu bi\u1ebft h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 h\u00ecnh ch\u1eef nh\u1eadt, th\u00ec di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0: S = a x b. Trong \u0111\u00f3: a v\u00e0 b l\u00e0 \u0111\u1ed9 d\u00e0i hai c\u1ea1nh c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt.<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_dang_bai_tap_tinh_dien_tich_hinh_binh_hanh_pho_bien\"><\/span>M\u1ed9t s\u1ed1 d\u1ea1ng b\u00e0i t\u1eadp t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh ph\u1ed5 bi\u1ebfn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">V\u1edbi ki\u1ebfn th\u1ee9c di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, c\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m quen t\u1eeb ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc to\u00e1n l\u1edbp 4. Trong giai \u0111o\u1ea1n n\u00e0y tr\u1ebb s\u1ebd \u0111\u01b0\u1ee3c chinh ph\u1ee5c nh\u1eefng d\u1ea1ng b\u00e0i t\u1eadp to\u00e1n sau:<\/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-binh-hanh-2.jpg\" alt=\"C\u00f3 nhi\u1ec1u d\u1ea1ng b\u00e0i t\u1eadp v\u1ec1 h\u00ecnh b\u00ecnh h\u00e0nh khi t\u00ednh di\u1ec7n t\u00edch. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_1_Tinh_dien_tich_khi_biet_do_dai_day_va_chieu_cao\"><\/span>D\u1ea1ng 1: T\u00ednh di\u1ec7n t\u00edch khi bi\u1ebft \u0111\u1ed9 d\u00e0i \u0111\u00e1y v\u00e0 chi\u1ec1u cao<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i: \u00c1p d\u1ee5ng \u0111\u00fang c\u00f4ng th\u1ee9c chu\u1ea9n S = a x h (S l\u00e0 di\u1ec7n t\u00edch, a l\u00e0 \u0111\u1ed9 d\u00e0i \u0111\u00e1y, h l\u00e0 chi\u1ec1u cao) \u0111\u1ec3 t\u00ednh di\u1ec7n t\u00edch h\u00ecnh ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: Cho h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 \u0111\u1ed9 d\u00e0i \u0111\u00e1y l\u00e0 10 cm v\u00e0 chi\u1ec1u cao l\u00e0 8 cm. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh?<\/p>\n<p dir=\"ltr\">C\u00e1ch gi\u1ea3i: \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh: S = 10 x 8 = 80 cm\u00b2. V\u1eady, di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 80 cm\u00b2.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_2_Tinh_do_dai_day_khi_biet_dien_tich_va_chieu_cao_hinh_binh_hanh\"><\/span>D\u1ea1ng 2: T\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y khi bi\u1ebft di\u1ec7n t\u00edch v\u00e0 chi\u1ec1u cao h\u00ecnh b\u00ecnh h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i: T\u1eeb c\u00f4ng th\u1ee9c chu\u1ea9n\u00a0S=a x h, ta suy ra c\u00f4ng th\u1ee9c t\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y nh\u01b0 sau: a = S : h<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: Cho h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 di\u1ec7n t\u00edch l\u00e0 54 cm\u00b2 v\u00e0 chi\u1ec1u cao l\u00e0 6 cm. T\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh?<\/p>\n<p dir=\"ltr\">C\u00e1ch gi\u1ea3i: \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh: a = 54 \/ 6 = 9 cm. V\u1eady, \u0111\u1ed9 d\u00e0i \u0111\u00e1y c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 9 cm.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_3_Tinh_chieu_cao_khi_biet_dien_tich_va_do_dai_day_hinh_binh_hanh\"><\/span>D\u1ea1ng 3: T\u00ednh chi\u1ec1u cao khi bi\u1ebft di\u1ec7n t\u00edch v\u00e0 \u0111\u1ed9 d\u00e0i \u0111\u00e1y h\u00ecnh b\u00ecnh h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i: T\u1eeb c\u00f4ng th\u1ee9c S=a x h, ta suy ra c\u00f4ng th\u1ee9c t\u00ednh chi\u1ec1u cao c\u1ee7a h\u00ecnh l\u00e0 h = S : a<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: Cho h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 \u0111\u1ed9 d\u00e0i \u0111\u00e1y l\u00e0 12 cm v\u00e0 di\u1ec7n t\u00edch l\u00e0 72 cm\u00b2. T\u00ednh chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh?<\/p>\n<p dir=\"ltr\">C\u00e1ch gi\u1ea3i: \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh: h = 72 \/ 12 = 6 cm. V\u1eady, chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 6 cm.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_4_Bai_tap_tong_hop\"><\/span>D\u1ea1ng 4: B\u00e0i t\u1eadp t\u1ed5ng h\u1ee3p<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i: C\u00e1c em c\u1ea7n ph\u1ea3i \u0111\u1ecdc k\u0129 \u0111\u1ec1 b\u00e0i, x\u00e1c \u0111\u1ecbnh d\u1ea1ng to\u00e1n trong b\u00e0i v\u00e0 \u0111\u01b0a ra ph\u01b0\u01a1ng \u00e1n gi\u1ea3i ch\u00ednh x\u00e1c. Th\u01b0\u1eddng s\u1ebd l\u00e0 d\u1ea1ng to\u00e1n c\u00f3 l\u1eddi gi\u1ea3i v\u0103n v\u00e0 v\u1eadn d\u1ee5ng l\u00fd thuy\u1ebft l\u00e0m c\u00e2u h\u1ecfi tr\u1eafc nghi\u1ec7m.<\/p>\n<p dir=\"ltr\">\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_ve_dien_tich_cua_hinh_binh_hanh_de_be_tu_luyen\"><\/span>B\u00e0i t\u1eadp v\u1ec1 di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh \u0111\u1ec3 b\u00e9 t\u1ef1 luy\u1ec7n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u1ec1 vi\u1ec7c t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh \u0111\u1ec3 c\u00e1c em luy\u1ec7n t\u1eadp:<\/p>\n<p>B\u00e0i t\u1eadp 1: Cho h\u00ecnh b\u00ecnh h\u00e0nh ABCD c\u00f3 \u0111\u1ed9 d\u00e0i \u0111\u00e1y l\u00e0 8 cm v\u00e0 chi\u1ec1u cao l\u00e0 6 cm. T\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh ABCD.<\/p>\n<p>B\u00e0i t\u1eadp 2: Cho h\u00ecnh b\u00ecnh h\u00e0nh ABCD c\u00f3 di\u1ec7n t\u00edch l\u00e0 24 cm\u00b2 v\u00e0 chi\u1ec1u cao l\u00e0 3 cm. T\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh ABCD.<\/p>\n<p>B\u00e0i t\u1eadp 3: Cho h\u00ecnh b\u00ecnh h\u00e0nh ABCD c\u00f3 \u0111\u1ed9 d\u00e0i \u0111\u00e1y l\u00e0 12 cm v\u00e0 di\u1ec7n t\u00edch g\u1ea5p 2 l\u1ea7n chi\u1ec1u cao. T\u00ednh chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh ABCD.<\/p>\n<p>B\u00e0i t\u1eadp 4: Cho h\u00ecnh b\u00ecnh h\u00e0nh ABCD c\u00f3 hai \u0111\u01b0\u1eddng ch\u00e9o AC v\u00e0 BD vu\u00f4ng g\u00f3c t\u1ea1i O. G\u1ecdi I l\u00e0 giao \u0111i\u1ec3m c\u1ee7a hai \u0111\u01b0\u1eddng ch\u00e9o. Bi\u1ebft AC = 12 cm, BD = 15 cm v\u00e0 IO = 6 cm. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh ABCD.<\/p>\n<p>B\u00e0i t\u1eadp 5: M\u1ed9t mi\u1ebfng \u0111\u1ea5t h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 di\u1ec7n t\u00edch l\u00e0 120 m\u00b2 v\u00e0 chi\u1ec1u cao l\u00e0 10 m. T\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y c\u1ee7a mi\u1ebfng \u0111\u1ea5t h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<p>B\u00e0i t\u1eadp 6: M\u1ed9t chi\u1ebfc b\u00e0n h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 di\u1ec7n t\u00edch l\u00e0 160 cm\u00b2 v\u00e0 chi\u1ec1u cao l\u00e0 8 cm. T\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y c\u1ee7a chi\u1ebfc b\u00e0n h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<p>B\u00e0i t\u1eadp 7: M\u1ed9t t\u1ea5m v\u1ea3i h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 \u0111\u1ed9 d\u00e0i \u0111\u00e1y l\u00e0 15 m v\u00e0 di\u1ec7n t\u00edch g\u1ea5p 2 l\u1ea7n chi\u1ec1u cao. T\u00ednh chi\u1ec1u cao c\u1ee7a t\u1ea5m v\u1ea3i h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<p>B\u00e0i t\u1eadp 8: M\u1ed9t s\u00e2n b\u00f3ng h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 di\u1ec7n t\u00edch l\u00e0 200 m\u00b2 v\u00e0 hai \u0111\u01b0\u1eddng ch\u00e9o vu\u00f4ng g\u00f3c t\u1ea1i O. G\u1ecdi I l\u00e0 giao \u0111i\u1ec3m c\u1ee7a hai \u0111\u01b0\u1eddng ch\u00e9o. Bi\u1ebft \u0111\u01b0\u1eddng ch\u00e9o AC = 20 m v\u00e0 IO = 5 m. T\u00ednh di\u1ec7n t\u00edch c\u1ee7a s\u00e2n b\u00f3ng h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<p>B\u00e0i t\u1eadp 9: M\u1ed9t mi\u1ebfng \u0111\u1ea5t h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 di\u1ec7n t\u00edch g\u1ea5p 3 l\u1ea7n di\u1ec7n t\u00edch c\u1ee7a m\u1ed9t mi\u1ebfng \u0111\u1ea5t h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i l\u00e0 10 m v\u00e0 chi\u1ec1u r\u1ed9ng l\u00e0 8 m. T\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y c\u1ee7a mi\u1ebfng \u0111\u1ea5t h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<p>B\u00e0i t\u1eadp 10: M\u1ed9t t\u1ea5m v\u1ea3i h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 di\u1ec7n t\u00edch g\u1ea5p 2 l\u1ea7n di\u1ec7n t\u00edch c\u1ee7a m\u1ed9t t\u1ea5m v\u1ea3i h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i l\u00e0 12 m v\u00e0 chi\u1ec1u r\u1ed9ng l\u00e0 7 m. T\u00ednh chi\u1ec1u cao c\u1ee7a t\u1ea5m v\u1ea3i h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Meo_giup_be_lam_bai_tap_tinh_dien_tich_hinh_binh_hanh_hieu_qua\"><\/span>M\u1eb9o gi\u00fap b\u00e9 l\u00e0m b\u00e0i t\u1eadp t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u00fap c\u00e1c em c\u00f3 th\u1ec3 ghi nh\u1edb, bi\u1ebft c\u00e1ch l\u00e0m b\u00e0i t\u1eadp v\u1ec1 ki\u1ebfn th\u1ee9c n\u00e0y, b\u1ed1 m\u1eb9 c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng ngay nh\u1eefng b\u00ed quy\u1ebft sau \u0111\u00e2y:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Xay_dung_niem_yeu_thich_hoc_toan_cho_tre_cung_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_Math\"><\/span>X\u00e2y d\u1ef1ng ni\u1ec1m y\u00eau th\u00edch h\u1ecdc to\u00e1n cho tr\u1ebb c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">To\u00e1n h\u1ecdc l\u00e0 m\u00f4n h\u1ecdc ch\u00ednh, nh\u01b0ng kh\u00e1 kh\u00f4 khan n\u00ean kh\u00f4ng ph\u1ea3i b\u00e9 n\u00e0o khi h\u1ecdc c\u0169ng h\u1ee9ng th\u00fa nh\u01b0 c\u00e1c m\u00f4n v\u0103n h\u00f3a kh\u00e1c. Ch\u00ednh v\u00ec v\u1eady, \u0111\u1ec3 gi\u00fap con c\u00f3 ni\u1ec1m y\u00eau th\u00edch v\u00e0 x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c n\u1ec1n t\u1ea3ng to\u00e1n h\u1ecdc v\u1eefng ch\u1eafc, b\u1ed1 m\u1eb9 c\u00f3 th\u1ec3 \u0111\u1ea7u t\u01b0 \u1ee9ng d\u1ee5ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math.<\/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\/hinh-binh-hanh-6.jpg\" alt=\"T\u1ea1o s\u1ef1 h\u1ee9ng th\u00fa khi h\u1ecdc to\u00e1n cho b\u00e9 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\">\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng \u1ee9ng d\u1ee5ng d\u1ea1y to\u00e1n t\u01b0 duy ti\u1ebfng Anh online \u0111\u01b0\u1ee3c Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef ph\u00e1t tri\u1ec3n d\u00e0nh ri\u00eang cho \u0111\u1ed1i t\u01b0\u1ee3ng l\u00e0 tr\u1ebb m\u1ea7m non v\u00e0 ti\u1ec3u h\u1ecdc. C\u00f9ng v\u1edbi vi\u1ec7c b\u00e1m s\u00e1t n\u1ed9i dung d\u1ea1y h\u1ecdc chu\u1ea9n ch\u01b0\u01a1ng tr\u00ecnh GDPT m\u1edbi nh\u1ea5t, \u0111\u1ec3 qua \u0111\u00f3 h\u1ed7 tr\u1ee3 vi\u1ec7c h\u1ecdc tr\u00ean l\u1edbp v\u00e0 ph\u00e1t tri\u1ec3n t\u01b0 duy to\u00e1n h\u1ecdc hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<p dir=\"ltr\">\u0110i\u1ec3m th\u00fa v\u1ecb khi cho b\u00e9 h\u1ecdc to\u00e1n ch\u00ednh l\u00e0 m\u1ed7i b\u00e0i h\u1ecdc \u0111\u1ec1u \u0111\u01b0\u1ee3c bi\u00ean so\u1ea1n d\u01b0\u1edbi d\u1ea1ng video, h\u00ecnh \u1ea3nh ho\u1ea1t h\u1ecda ng\u1ed9 ngh\u0129nh. \u0110i\u1ec1u n\u00e0y s\u1ebd g\u00f3p ph\u1ea7n t\u0103ng s\u1ef1 ch\u00fa \u00fd, h\u1ee9ng th\u00fa v\u00e0 t\u0103ng kh\u1ea3 n\u0103ng ghi nh\u1edb t\u1ed1t h\u01a1n so v\u1edbi h\u1ecdc l\u00fd thuy\u1ebft tr\u00ean s\u00e1ch v\u1edf.<\/p>\n<p dir=\"ltr\">K\u1ebft h\u1ee3p v\u1edbi \u0111\u00f3, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math c\u00f2n x\u00e2y d\u1ef1ng h\u01a1n 10.000 ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u00e1c \u0111\u1ec3 b\u00e9 v\u1eeba \u0111\u01b0\u1ee3c h\u1ecdc, v\u1eeba \u0111\u01b0\u1ee3c ch\u01a1i. M\u1ed9t ph\u01b0\u01a1ng ph\u00e1p d\u1ea1y h\u1ecdc t\u00edch c\u1ef1c hi\u1ec7n nay \u0111\u01b0\u1ee3c nhi\u1ec1u n\u1ec1n gi\u00e1o d\u1ee5c tr\u00ean th\u1ebf gi\u1edbi \u00e1p d\u1ee5ng. \u0110\u1ec3 qua \u0111\u00f3 gi\u00fap k\u00edch th\u00edch t\u01b0 duy h\u1ecdc to\u00e1n v\u00e0 x\u00e2y d\u1ef1ng ni\u1ec1m y\u00eau th\u00edch v\u1edbi m\u00f4n h\u1ecdc n\u00e0y hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<p dir=\"ltr\">\u0110i k\u00e8m v\u1edbi \u0111\u00f3, c\u00e1c b\u00e9 c\u00f2n \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 h\u1ecdc ngo\u1ea1i ng\u1eef m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean nh\u1ea5t. B\u1edfi v\u00ec to\u00e0n b\u00e0i h\u1ecdc tr\u00ean Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math \u0111\u1ec1u \u0111\u01b0\u1ee3c gi\u1ea3ng d\u1ea1y b\u1eb1ng ti\u1ebfng Anh, nh\u01b0ng nh\u1edd h\u00ecnh \u1ea3nh minh h\u1ecda r\u00f5 r\u00e0ng n\u00ean b\u00e9 kh\u00f4ng bi\u1ebft ngo\u1ea1i ng\u1eef v\u1eabn c\u00f3 th\u1ec3 h\u1ecdc \u0111\u1ec3 n\u00e2ng cao n\u0103ng l\u1ef1c h\u1ecdc ti\u1ebfng Anh c\u1ee7a con t\u1ed1t h\u01a1n.<\/p>\n<p dir=\"ltr\">\u0110\u1eb7c bi\u1ec7t, ch\u01b0a \u0111\u1ebfn 2K\/ng\u00e0y \u0111\u00e3 c\u00f3 th\u1ec3 gi\u00fap b\u00e9 t\u0103ng kh\u1ea3 n\u0103ng v\u00e0 n\u0103ng l\u1ef1c h\u1ecdc to\u00e1n th\u00ec b\u1ed1 m\u1eb9 ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 y\u00ean t\u00e2m \u0111\u1ea7u t\u01b0 cho b\u00e9 theo h\u1ecdc.<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/xemchitiet.png\" alt=\"\" width=\"185\" height=\"42\"><\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><iframe loading=\"lazy\" title=\"Gi\u1edbi thi\u1ec7u \u1ee9ng d\u1ee5ng Monkey Math\" width=\"1020\" height=\"574\" src=\"https:\/\/www.youtube.com\/embed\/7DsjpvHFrOs?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Nam_chac_ly_thuyet_cong_thuc_tinh_dien_tich_hinh_binh_hanh\"><\/span>N\u1eafm ch\u1eafc l\u00fd thuy\u1ebft, 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\">\u0110\u1ec3 gi\u1ea3i \u0111\u01b0\u1ee3c b\u00e0i t\u1eadp v\u1ec1 h\u00ecnh b\u00ecnh h\u00e0nh, \u0111\u00f2i h\u1ecfi c\u00e1c em ph\u1ea3i n\u1eafm ch\u1eafc l\u00fd thuy\u1ebft. Nh\u1ea5t v\u1edbi nh\u1eefng d\u1ea1ng b\u00e0i t\u1eadp t\u00ednh di\u1ec7n t\u00edch, c\u00e1c b\u00e9 nh\u1ea5t \u0111\u1ecbnh ph\u1ea3i n\u1eafm r\u00f5 c\u00f4ng th\u1ee9c chu\u1ea9n l\u00e0 S = a x h, \u0111\u1ec3 t\u1eeb \u0111\u00f3 d\u1ec5 d\u00e0ng \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c \u0111\u1ec3 gi\u1ea3i b\u00e0i t\u1eadp ch\u00ednh x\u00e1c nh\u1ea5t.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Thuc_hanh_thuong_xuyen_la_dieu_quan_trong\"><\/span>Th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Sau khi \u0111\u00e3 n\u1eafm \u0111\u01b0\u1ee3c l\u00fd thuy\u1ebft, b\u1ed1 m\u1eb9 n\u00ean c\u00f9ng con th\u1ef1c h\u00e0nh nhi\u1ec1u h\u01a1n nh\u01b0 <em>c\u00f9ng l\u00e0m b\u00e0i t\u1eadp trong SGK, b\u00e0i t\u1eadp \u0111\u01b0\u1ee3c giao, t\u00ecm hi\u1ec3u th\u00eam nhi\u1ec1u t\u00e0i li\u1ec7u tham kh\u1ea3o tr\u00ean internet, luy\u1ec7n \u0111\u1ec1 thi,\u2026 <\/em>Ch\u00ednh \u0111i\u1ec1u n\u00e0y s\u1ebd gi\u00fap k\u00edch th\u00edch n\u00e3o b\u1ed9, kh\u1ea3 n\u0103ng t\u01b0 duy c\u1ee7a tr\u1ebb khi h\u1ecdc to\u00e1n t\u1ed1t h\u01a1n.<\/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-binh-hanh-4.jpg\" alt=\"B\u1ed1 m\u1eb9 n\u00ean c\u00f9ng con th\u1ef1c h\u00e0nh gi\u1ea3i to\u00e1n th\u01b0\u1eddng xuy\u00ean. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Hoc_cong_thuc_tinh_dien_tich_cua_hinh_binh_hanh_qua_tho\"><\/span>H\u1ecdc c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh qua th\u01a1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ec3 h\u1ed7 tr\u1ee3 c\u00e1c em d\u1ec5 d\u00e0ng ghi nh\u1edb c\u00f4ng th\u1ee9c trong h\u00ecnh h\u1ecdc, n\u00ean nhi\u1ec1u gi\u00e1o vi\u00ean \u0111\u00e3 ngh\u0129 ra c\u00e1c b\u00e0i th\u01a1, c\u00e2u \u0111\u1ed1. V\u1edbi c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch trong h\u00ecnh b\u00ecnh h\u00e0nh, ta c\u00f3 c\u00e2u th\u01a1 kh\u00e1 d\u1ec5 h\u1ecdc v\u00e0 nh\u1edb nh\u01b0:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><em>\u201cDi\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<\/em><\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><em>Chi\u1ec1u d\u00e0i nh\u00e2n \u0111\u00e1y \u2013 t\u00ednh nhanh l\u00ean n\u00e0o!\u201d<\/em><\/p>\n<p dir=\"ltr\">Ho\u1eb7c:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><em>\u201cB\u00ecnh h\u00e0nh di\u1ec7n t\u00edch t\u00ednh sao<\/em><\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><em>Chi\u1ec1u cao nh\u00e2n \u0111\u00e1y ra li\u1ec1n kh\u00f3 chi<\/em><\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><em>Chu vi th\u00ec c\u1ea7n nh\u1eefng g\u00ec<\/em><\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><em>C\u1ea1nh k\u1ec1 c\u1ed9ng l\u1ea1i ta th\u1eddi nh\u00e2n hai\u201d<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_luu_y_khi_tinh_dien_tich_cua_hinh_binh_hanh\"><\/span>M\u1ed9t s\u1ed1 l\u01b0u \u00fd khi t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trong qu\u00e1 tr\u00ecnh gi\u1ea3i b\u00e0i t\u1eadp h\u00ecnh b\u00ecnh h\u00e0nh d\u1ea1ng b\u00e0i t\u00ednh di\u1ec7n t\u00edch, c\u00e1c em c\u1ea7n l\u01b0u \u00fd m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1ecdc v\u00e0 ph\u00e2n t\u00edch k\u1ef9 \u0111\u1ec1 b\u00e0i \u0111\u1ec3 bi\u1ebft r\u00f5 y\u00eau c\u1ea7u v\u00e0 \u0111\u01b0a ra l\u1eddi gi\u1ea3i ch\u00ednh x\u00e1c, tr\u00e1nh nh\u1ea7m l\u1eabn.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ch\u00fa \u00fd c\u00e1c \u0111\u01a1n v\u1ecb khi t\u00ednh di\u1ec7n t\u00edch ph\u1ea3i c\u00f9ng nhau, n\u1ebfu l\u00e0 cm2 ph\u1ea3i l\u00e0 cm2, n\u1ebfu kh\u00e1c nhau ph\u1ea3i quy \u0111\u1ed5i v\u1ec1 c\u00f9ng \u0111\u01a1n v\u1ecb \u0111o.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">N\u00ean quan s\u00e1t k\u1ef9 h\u00ecnh, k\u1ebft h\u1ee3p l\u00fd thuy\u1ebft \u0111\u1ec3 gi\u1ea3i b\u00e0i t\u1eadp ch\u00ednh x\u00e1c.<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\" style=\"line-height: 1.7999999999999998;text-align: justify;margin-top: 12pt;margin-bottom: 12pt\">Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh. Hy v\u1ecdng d\u1ef1a v\u00e0o nh\u1eefng chia s\u1ebb n\u00e0y s\u1ebd gi\u00fap c\u00e1c em gi\u1ea3i b\u00e0i t\u1eadp v\u00e0 \u1ee9ng d\u1ee5ng trong th\u1ef1c t\u1ebf m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c nh\u1ea5t.<\/p>\n<p>                                    \u00a0\u00a0T\u00e0i li\u1ec7u tham kh\u1ea3o<\/p>\n<p>Area of Parallelogram<\/p>\n<p>https:\/\/byjus.com\/maths\/area-of-parallelogram\/<\/p>\n<p>Area of Parallelogram<\/p>\n<p>https:\/\/www.cuemath.com\/measurement\/area-of-parallelogram\/<\/p>\n<p>Ngu\u1ed3n: <a href=\"http:\/\/www.ckconitsha.com\/vn\/\">http:\/\/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\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 ki\u1ebfn th\u1ee9c trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n h\u1ecdc l\u1edbp 4 m\u00e0 c\u00e1c em c\u1ea7n ph\u1ea3i n\u1eafm r\u00f5. V\u1eady n\u00ean, trong n\u1ed9i dung b\u00e0i vi\u1ebft sau \u0111\u00e2y Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd t\u1ed5ng h\u1ee3p, ph\u00e2n t\u00edch \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ec3 c\u00e1c em n\u1eafm r\u00f5. H\u00e0ng tri\u1ec7u&#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-16474","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/16474","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=16474"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/16474\/revisions"}],"predecessor-version":[{"id":22884,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/16474\/revisions\/22884"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=16474"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=16474"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=16474"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}