{"id":38025,"date":"2025-08-01T12:16:00","date_gmt":"2025-08-01T05:16:00","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=38025"},"modified":"2025-08-01T23:36:35","modified_gmt":"2025-08-01T16:36:35","slug":"cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/","title":{"rendered":"C\u00e1ch t\u00ednh chu vi h\u00ecnh thang: Th\u01b0\u1eddng, Vu\u00f4ng, C\u00e2n (k\u00e8m b\u00e0i t\u1eadp c\u00f3 \u0111\u00e1p \u00e1n)"},"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-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Trapezoid_la_gi\" >Trapezoid l\u00e0 g\u00ec?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Khai_niem_ve_hinh_thang\" >Kh\u00e1i ni\u1ec7m v\u1ec1 h\u00ecnh thang<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Cac_loai_cong_dong\" >C\u00e1c lo\u1ea1i c\u1ed9ng \u0111\u1ed3ng<\/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\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Dau_hieu_nhan_dang_hinh_thang\" >D\u1ea5u hi\u1ec7u nh\u1eadn d\u1ea1ng 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-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Cong_thuc_tinh_toan_chu_vi_cua_hinh_thang\" >C\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi c\u1ee7a h\u00ecnh thang<\/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-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Cong_thuc_chu_vi_binh_thuong\" >C\u00f4ng th\u1ee9c chu vi b\u00ecnh th\u01b0\u1eddng<\/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-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Cong_thuc_tinh_chu_vi_hinh_thang_vuong\" >C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh thang 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\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Cong_thuc_tinh_toan_chu_vi_cua_hinh_thang-2\" >C\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi c\u1ee7a 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-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Cac_loai_bai_tap_ve_chu_vi_hinh_thang\" >C\u00e1c lo\u1ea1i b\u00e0i t\u1eadp v\u1ec1 chu vi h\u00ecnh thang<\/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-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Mau_1_Tinh_chu_vi_cua_hinh_thang_khi_biet_chieu_dai_cua_day_va_ben\" >M\u1eabu 1: T\u00ednh chu vi c\u1ee7a h\u00ecnh thang khi bi\u1ebft chi\u1ec1u d\u00e0i c\u1ee7a \u0111\u00e1y v\u00e0 b\u00ean<\/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-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Mau_2_Tinh_chieu_dai_ben_cua_hinh_thang_khi_ban_biet_chu_vi\" >M\u1eabu 2: T\u00ednh chi\u1ec1u d\u00e0i b\u00ean c\u1ee7a h\u00ecnh thang khi b\u1ea1n bi\u1ebft chu vi<\/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\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Hay_nho_va_cac_quy_tac_cua_cong_thuc_chu_vi_hinh_thang\" >H\u00e3y nh\u1edb v\u00e0 c\u00e1c quy t\u1eafc c\u1ee7a c\u00f4ng th\u1ee9c chu vi h\u00ecnh thang<\/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\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Meo_de_ghi_nho_cong_thuc_hieu_qua\" >M\u1eb9o \u0111\u1ec3 ghi nh\u1edb c\u00f4ng th\u1ee9c hi\u1ec7u qu\u1ea3<\/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\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Luat_cong_thuc_tinh_toan_chu_vi\" >Lu\u1eadt c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Tim_hieu_lam_the_nao_de_tinh_chu_vi_hinh_thang_de_dang_hon_voi_toan_hoc_khi\" >T\u00ecm hi\u1ec3u l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ednh chu vi h\u00ecnh thang d\u1ec5 d\u00e0ng h\u01a1n v\u1edbi to\u00e1n h\u1ecdc kh\u1ec9!<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Thuc_hanh_chu_vi_chu_vi_hinh_thang\" >Th\u1ef1c h\u00e0nh chu vi chu vi h\u00ecnh thang<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.ckconitsha.com\/vn\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Tap_the_duc_voi_cac_giai_phap\" >T\u1eadp th\u1ec3 d\u1ee5c v\u1edbi c\u00e1c gi\u1ea3i ph\u00e1p<\/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-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Bai_tap_tu_dong\" >B\u00e0i t\u1eadp t\u1ef1 \u0111\u1ed9ng<\/a><\/li><\/ul><\/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\/cach-tinh-chu-vi-hinh-thang-thuong-vuong-can-kem-bai-tap-co-dap-an\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>Trapezoid l\u00e0 m\u1ed9t t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t, m\u1ed9t trong nh\u1eefng h\u00ecnh h\u1ecdc ph\u1ed5 bi\u1ebfn ng\u00e0y nay. \u0110\u1ec3 bi\u1ebft c\u00e1ch t\u00ednh chu vi c\u1ee7a b\u00e0i t\u1eadp b\u00ecnh th\u01b0\u1eddng, vu\u00f4ng, c\u00e2n v\u00e0 chi ti\u1ebft, n\u1ed9i dung<\/p>\n<p>                                    <\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Trapezoid_la_gi\"><\/span>Trapezoid l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trapezoid l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i to\u00e1n h\u1ecdc c\u01a1 b\u1ea3n. H\u00e3y t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 h\u00ecnh thang ngay t\u1ea1i \u0111\u00e2y:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Khai_niem_ve_hinh_thang\"><\/span>Kh\u00e1i ni\u1ec7m v\u1ec1 h\u00ecnh thang<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">H\u00ecnh thang l\u00e0 h\u00ecnh h\u1ecdc euclide, m\u1ed9t h\u00ecnh t\u1ee9 gi\u00e1c \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb hai c\u1ea1nh song song (c\u1ea1nh d\u01b0\u1edbi) v\u00e0 hai c\u1ea1nh.<\/p>\n<p dir=\"ltr\">Ho\u1eb7c h\u00ecnh thang l\u00e0 h\u00ecnh t\u1ee9 gi\u00e1c v\u1edbi 2 c\u1ea1nh song song, 2 g\u00f3c li\u1ec1n k\u1ec1 v\u1edbi m\u1ed9t b\u00ean v\u1edbi t\u1ed5ng s\u1ed1 \u0111o 180 \u0111\u1ed9. N\u1ebfu 1 h\u00ecnh thang c\u00f3 2 c\u1ea1nh b\u1eb1ng nhau, hai c\u1ea1nh c\u0169ng b\u1eb1ng nhau v\u00e0 song song. Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu h\u00ecnh thang c\u00f3 2 c\u1ea1nh song song, ch\u00fang s\u1ebd b\u1eb1ng nhau v\u00e0 hai b\u00ean c\u0169ng s\u1ebd b\u1eb1ng nhau. C\u1ee5 th\u1ec3, h\u00ecnh thang s\u1ebd c\u00f3 2 \u0111\u01b0\u1eddng ch\u00e9o b\u1eb1ng nhau.<\/p>\n<p dir=\"ltr\">Ngo\u00e0i ra, h\u00ecnh thang c\u0169ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 m\u1ed9t h\u00ecnh t\u1ee9 gi\u00e1c l\u1ed3i v\u1edbi 4 c\u1ea1nh. Bao g\u1ed3m 2 c\u1ea1nh \u1edf c\u1ea3 hai m\u1eb7t v\u1edbi 2 c\u1ea1nh song song \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u1ea1nh d\u01b0\u1edbi.<\/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\/chu-vi-hinh-thang-1.jpg\" alt=\"C\u00e1c t\u00ednh n\u0103ng c\u1ee7a h\u00ecnh thang. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_loai_cong_dong\"><\/span>C\u00e1c lo\u1ea1i c\u1ed9ng \u0111\u1ed3ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Trong h\u00ecnh thang \u0111\u01b0\u1ee3c chia th\u00e0nh nhi\u1ec1u lo\u1ea1i nh\u01b0 sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh thang l\u00e0 m\u1ed9t h\u00ecnh thang v\u1edbi m\u1ed9t g\u00f3c vu\u00f4ng.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh thang l\u00e0 m\u1ed9t h\u00ecnh thang v\u1edbi hai g\u00f3c li\u1ec1n k\u1ec1 v\u1edbi m\u1ed9t \u0111\u00e1y b\u1eb1ng nhau.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 m\u1ed9t h\u00ecnh thang v\u1edbi hai c\u1ea1nh d\u01b0\u1edbi b\u1eb1ng v\u00e0 2 c\u1ea1nh song song v\u00e0 b\u1eb1ng nhau.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh ch\u1eef nh\u1eadt l\u00e0 m\u1ed9t h\u00ecnh thang v\u1eeba l\u00e0 h\u00ecnh vu\u00f4ng v\u00e0 c\u00e2n.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/chu-vi-hinh-thang-2.jpg\" alt=\"C\u00e1c lo\u1ea1i h\u00ecnh thang c\u01a1 b\u1ea3n. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dau_hieu_nhan_dang_hinh_thang\"><\/span>D\u1ea5u hi\u1ec7u nh\u1eadn d\u1ea1ng h\u00ecnh thang<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ec3 x\u00e1c \u0111\u1ecbnh h\u00ecnh thang v\u1edbi h\u00ecnh h\u1ecdc kh\u00e1c, ch\u00fang t\u00f4i d\u1ef1a v\u00e0o c\u00e1c d\u1ea5u hi\u1ec7u sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u1ee9 gi\u00e1c c\u00f3 hai m\u1eb7t song song<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh thang c\u00f3 h\u00ecnh thang vu\u00f4ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh thang c\u00f3 hai g\u00f3c li\u1ec1n k\u1ec1 v\u1edbi m\u1ed9t \u0111\u00e1y l\u00e0 h\u00ecnh thang<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh thang c\u00f3 hai m\u1eb7t b\u1eb1ng nhau, l\u00e0 h\u00ecnh thang<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh thang c\u00f3 hai \u0111\u01b0\u1eddng ch\u00e9o b\u1eb1ng nhau, l\u00e0 h\u00ecnh thang<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh thang c\u00f3 hai g\u00f3c li\u1ec1n k\u1ec1 v\u1edbi m\u1ed9t c\u1ea1nh d\u01b0\u1edbi b\u1eb1ng nhau l\u00e0 tr\u1ecdng l\u01b0\u1ee3ng h\u00ecnh thang.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh thang c\u00f3 hai \u0111\u01b0\u1eddng ch\u00e9o b\u1eb1ng nhau: tr\u1ecdng l\u01b0\u1ee3ng h\u00ecnh thang.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh thang c\u00f3 hai tr\u1ee5c \u0111\u1ed1i x\u1ee9ng c\u1ee7a c\u1ea3 hai tr\u00f9ng v\u1edbi h\u00ecnh thang h\u00ecnh thang.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh thang c\u00f3 hai m\u1eb7t b\u1eb1ng nhau, l\u00e0 h\u00ecnh thang.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh thang \u0111\u01b0\u1ee3c ghi l\u00e0 h\u00ecnh thang<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_toan_chu_vi_cua_hinh_thang\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi c\u1ee7a h\u00ecnh thang<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Chu vi h\u00ecnh thang l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng xung quanh b\u1ee9c tranh. C\u0169ng nh\u01b0 qu\u00e2n \u0111\u1ed9i m\u1ed9t h\u00ecnh thang v\u00e0 t\u1ed5ng chi\u1ec1u d\u00e0i c\u1ee7a d\u00f2ng n\u00e0y.<\/p>\n<p dir=\"ltr\">Ngo\u00e0i ra, t\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i h\u00ecnh thang, s\u1ebd c\u00f3 c\u00e1c c\u00f4ng th\u1ee9c chu vi kh\u00e1c nhau. C\u1ee5 th\u1ec3:<\/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\/chu-vi-hinh-thang-3.jpg\" alt=\"M\u1ed9t s\u1ed1 c\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n li\u00ean quan \u0111\u1ebfn h\u00ecnh thang. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_chu_vi_binh_thuong\"><\/span>C\u00f4ng th\u1ee9c chu vi b\u00ecnh th\u01b0\u1eddng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fbeeb8\" border=\"1\">\n<tr>\n<td style=\"width: 98.5189%\">\n<p dir=\"ltr\">Chu vi h\u00ecnh thang b\u1eb1ng t\u1ed5ng c\u1ee7a c\u00e1c c\u1ea1nh v\u00e0 ph\u00eda d\u01b0\u1edbi.<\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c: P = A + B + C + D<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">Trong \u0111\u00f3: <\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">P l\u00e0 chu vi h\u00ecnh thang<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">A v\u00e0 B t\u01b0\u01a1ng \u1ee9ng l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a \u0111\u00e1y.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C v\u00e0 D l\u1ea7n l\u01b0\u1ee3t l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a 2 m\u1eb7t.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5, \u0111\u1ed1i v\u1edbi ABCD h\u00ecnh thang v\u1edbi chi\u1ec1u d\u00e0i c\u1ee7a c\u00e1c c\u1ea1nh t\u01b0\u01a1ng \u1ee9ng 8cm, chi\u1ec1u d\u00e0i d\u01b0\u1edbi c\u00f9ng l\u1edbn l\u00e0 16 cm v\u00e0 chi\u1ec1u d\u00e0i \u0111\u00e1y nh\u1ecf l\u00e0 8 cm. T\u00ednh chu vi c\u1ee7a ABCD.<\/em><\/p>\n<p dir=\"ltr\"><em>Gi\u1ea3i ph\u00e1p:<\/em><\/p>\n<p dir=\"ltr\"><em>Chu vi c\u1ee7a h\u00ecnh thang ABCD l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>8+8+8+16 = 40 (cm)<\/em><\/p>\n<p dir=\"ltr\"><em>Tr\u1ea3 l\u1eddi: 40 cm.<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_chu_vi_hinh_thang_vuong\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh thang vu\u00f4ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fbeeb8\" border=\"1\">\n<tr>\n<td style=\"width: 98.5189%\">\n<p dir=\"ltr\">H\u00ecnh thang l\u00e0 m\u1ed9t h\u00ecnh thang v\u1edbi m\u1ed9t g\u00f3c vu\u00f4ng l\u00e0 b\u00ean v\u00e0 chi\u1ec1u cao c\u1ee7a h\u00ecnh \u1ea3nh. Li\u00ean quan \u0111\u1ebfn vi\u1ec7c t\u00ednh to\u00e1n chu vi h\u00ecnh thang vu\u00f4ng s\u1ebd t\u01b0\u01a1ng t\u1ef1 nh\u01b0 h\u00ecnh thang b\u00ecnh th\u01b0\u1eddng.<\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c: P = A + B + C + D<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">P l\u00e0 bi\u1ec3u t\u01b0\u1ee3ng chu vi.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">A, B l\u00e0 hai m\u1eb7t h\u00ecnh thang.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C, D l\u00e0 m\u1eb7t c\u1ee7a h\u00ecnh thang.<\/p>\n<\/li>\n<\/ul>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_toan_chu_vi_cua_hinh_thang-2\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi c\u1ee7a h\u00ecnh thang<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fbeeb8\" border=\"1\">\n<tr>\n<td style=\"width: 98.5189%\">\n<p dir=\"ltr\">H\u00ecnh thang c\u00f3 2 g\u00f3c li\u1ec1n k\u1ec1 v\u1edbi m\u1ed9t \u0111\u00e1y b\u1eb1ng v\u1edbi h\u00ecnh thang. C\u1ee5 th\u1ec3, hai c\u1ea1nh c\u1ee7a h\u00ecnh \u1ea3nh s\u1ebd b\u1eb1ng nhau nh\u01b0ng kh\u00f4ng song song. C\u00f4ng th\u1ee9c chu vi s\u1ebd kh\u00e1c v\u1edbi h\u00ecnh thang nh\u01b0 sau:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">P = (2 xa) + B + C<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">P l\u00e0 bi\u1ec3u t\u01b0\u1ee3ng chu vi.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">A, B l\u00e0 hai m\u1eb7t h\u00ecnh thang.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C, D l\u00e0 m\u1eb7t c\u1ee7a h\u00ecnh thang.<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_loai_bai_tap_ve_chu_vi_hinh_thang\"><\/span>C\u00e1c lo\u1ea1i b\u00e0i t\u1eadp v\u1ec1 chu vi h\u00ecnh thang<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n h\u1ecdc, h\u1ecd s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m quen v\u00e0 chinh ph\u1ee5c m\u1ed9t s\u1ed1 h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc li\u00ean quan \u0111\u1ebfn chu vi h\u00ecnh thang nh\u01b0 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\/chu-vi-hinh-thang-4.jpg\" alt=\"C\u00f3 nhi\u1ec1u lo\u1ea1i b\u00e0i t\u1eadp li\u00ean quan \u0111\u1ebfn t\u00ednh to\u00e1n chu vi c\u1ee7a h\u00ecnh thang. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_1_Tinh_chu_vi_cua_hinh_thang_khi_biet_chieu_dai_cua_day_va_ben\"><\/span>M\u1eabu 1: T\u00ednh chu vi c\u1ee7a h\u00ecnh thang khi bi\u1ebft chi\u1ec1u d\u00e0i c\u1ee7a \u0111\u00e1y v\u00e0 b\u00ean<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p: \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c chu vi h\u00ecnh thang t\u01b0\u01a1ng \u1ee9ng \u0111\u1ec3 c\u00f3 k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5, \u0111\u01b0a ra m\u1ed9t h\u00ecnh thang bi\u1ebft \u0111\u00e1y 12 cm; \u0110\u00e1y nh\u1ecf l\u00e0 10 cm v\u00e0 hai c\u1ea1nh t\u01b0\u01a1ng \u1ee9ng l\u00e0 7 cm v\u00e0 8 cm. T\u00ednh chu vi c\u1ee7a h\u00ecnh thang.<\/em><\/p>\n<p dir=\"ltr\"><em>Gi\u1ea3i ph\u00e1p:<\/em><\/p>\n<p dir=\"ltr\"><em>Chu vi h\u00ecnh thang l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>12 + 10 + 7 + 8 = 37 (cm)<\/em><\/p>\n<p dir=\"ltr\"><em>Tr\u1ea3 l\u1eddi: 37cm<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_2_Tinh_chieu_dai_ben_cua_hinh_thang_khi_ban_biet_chu_vi\"><\/span>M\u1eabu 2: T\u00ednh chi\u1ec1u d\u00e0i b\u00ean c\u1ee7a h\u00ecnh thang khi b\u1ea1n bi\u1ebft chu vi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p: T\u1eeb c\u00f4ng th\u1ee9c chu vi c\u1ee7a h\u00ecnh thang, k\u1ebft h\u1ee3p v\u1edbi d\u1eef li\u1ec7u \u0111\u00e3 cho \u0111\u1ec3 suy ra t\u00ednh to\u00e1n c\u1ea1nh -ted c\u1ea1nh t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5, \u0111\u1ed1i v\u1edbi m\u1ed9t h\u00ecnh thang v\u1edbi hai c\u1ea1nh b\u1eb1ng nhau bi\u1ebft chu vi c\u1ee7a h\u00ecnh thang l\u00e0 68cm v\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a hai c\u1ea1nh d\u01b0\u1edbi l\u1ea7n l\u01b0\u1ee3t l\u00e0 20 cm v\u00e0 26cm. T\u00ednh chi\u1ec1u d\u00e0i c\u1ee7a h\u00ecnh thang.<\/em><\/p>\n<p dir=\"ltr\"><em>Gi\u1ea3i ph\u00e1p:<\/em><\/p>\n<p dir=\"ltr\"><em>T\u1ed5ng chi\u1ec1u d\u00e0i c\u1ee7a hai c\u1ea1nh c\u1ee7a h\u00ecnh thang l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>68 &#8211; 20 &#8211; 26 = 22 (cm)<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u1ed9 d\u00e0i b\u00ean c\u1ee7a h\u00ecnh thang l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>22: 2 = 11 (cm)<\/em><\/p>\n<p dir=\"ltr\"><em>Tr\u1ea3 l\u1eddi: 11cm<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Hay_nho_va_cac_quy_tac_cua_cong_thuc_chu_vi_hinh_thang\"><\/span>H\u00e3y nh\u1edb v\u00e0 c\u00e1c quy t\u1eafc c\u1ee7a c\u00f4ng th\u1ee9c chu vi h\u00ecnh thang<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u00fap h\u1ecd d\u1ec5 d\u00e0ng ghi nh\u1edb c\u00f4ng th\u1ee9c chu vi c\u1ee7a h\u00ecnh thang \u0111\u1ec3 th\u1ef1c hi\u1ec7n b\u00e0i t\u1eadp, \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 m\u1eb9o, c\u00f9ng v\u1edbi quy t\u1eafc t\u01b0\u01a1ng \u1ee9ng.<\/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\/chu-vi-hinh-thang-5.jpg\" alt=\"H\u1ecd c\u1ea7n hi\u1ec3u c\u00f4ng th\u1ee9c v\u00e0 quy t\u1eafc khi t\u00ednh chu vi c\u1ee7a h\u00ecnh thang. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Meo_de_ghi_nho_cong_thuc_hieu_qua\"><\/span>M\u1eb9o \u0111\u1ec3 ghi nh\u1edb c\u00f4ng th\u1ee9c hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Th\u00f4ng th\u01b0\u1eddng, chu vi c\u1ee7a m\u1ed9t h\u00ecnh h\u1ecdc th\u01b0\u1eddng s\u1ebd b\u1eb1ng t\u1ed5ng chi\u1ec1u d\u00e0i c\u1ee7a c\u00e1c c\u1ea1nh, v\u1edbi chu vi c\u1ee7a h\u00ecnh thang c\u0169ng kh\u00f4ng ngo\u1ea1i l\u1ec7. V\u00ec v\u1eady, h\u1ecd c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Luat_cong_thuc_tinh_toan_chu_vi\"><\/span>Lu\u1eadt c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Khi ti\u1ebfn h\u00e0nh b\u00e0i t\u1eadp chu vi h\u00ecnh thang, h\u1ecd c\u1ea7n \u0111\u1ea3m b\u1ea3o c\u00e1c \u0111\u01a1n v\u1ecb \u0111o c\u00e1c c\u1ea1nh gi\u1ed1ng nhau th\u00ec ch\u00fang s\u1ebd th\u00eam ch\u00fang.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tim_hieu_lam_the_nao_de_tinh_chu_vi_hinh_thang_de_dang_hon_voi_toan_hoc_khi\"><\/span>T\u00ecm hi\u1ec3u l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ednh chu vi h\u00ecnh thang d\u1ec5 d\u00e0ng h\u01a1n v\u1edbi to\u00e1n h\u1ecdc kh\u1ec9!<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p class=\"\" data-start=\"73\" data-end=\"428\">Thay v\u00ec ghi nh\u1edb c\u00f4ng th\u1ee9c m\u1ed9t c\u00e1ch kh\u00f4 khan, tr\u1ebb em s\u1ebd hi\u1ec3u b\u1ea3n ch\u1ea5t v\u00e0 \u00e1p d\u1ee5ng linh ho\u1ea1t vi\u1ec7c t\u00ednh to\u00e1n chu vi h\u00ecnh thang b\u00ecnh th\u01b0\u1eddng, h\u00ecnh thang vu\u00f4ng, tr\u1ecdng l\u01b0\u1ee3ng h\u00ecnh thang th\u00f4ng qua c\u00e1c b\u00e0i h\u1ecdc tr\u1ef1c quan v\u00e0 s\u1ed1ng \u0111\u1ed9ng tr\u00ean \u1ee9ng d\u1ee5ng to\u00e1n h\u1ecdc kh\u1ec9 &#8211; ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n ti\u1ebfng Anh cho tr\u1ebb em t\u1eeb 3 \u0111\u1ebfn 8 tu\u1ed5i, theo ch\u01b0\u01a1ng tr\u00ecnh gi\u00e1o d\u1ee5c \u0111\u1ea1i ch\u00fang m\u1edbi.<\/p>\n<p class=\"\" data-start=\"430\" data-end=\"750\">V\u1edbi h\u01a1n 400 b\u00e0i h\u1ecdc v\u00e0 h\u01a1n 10.000 ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u00e1c, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math gi\u00fap tr\u1ebb l\u00e0m ch\u1ee7 ki\u1ebfn th\u1ee9c h\u00ecnh h\u1ecdc th\u00f4ng qua c\u00e1c video ho\u1ea1t h\u00ecnh, tr\u00f2 ch\u01a1i v\u00e0 b\u00e0i t\u1eadp ph\u00e2n c\u1ea5p t\u1eeb d\u1ec5 kh\u00f3 kh\u0103n. Do \u0111\u00f3, tr\u1ebb em kh\u00f4ng ch\u1ec9 bi\u1ebft c\u00e1ch t\u00ednh chu vi m\u00e0 c\u00f2n ngh\u0129 v\u1ec1 h\u00ecnh d\u1ea1ng, c\u1ea5u tr\u00fac v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh h\u1ecdc m\u1ed9t c\u00e1ch logic v\u00e0 ch\u1ee7 \u0111\u1ed9ng.<\/p>\n<p dir=\"ltr\" style=\"text-align: center\"> <a href=\"https:\/\/www.youtube.com\/watch?v=7DSJPVHFROS\" target=\"_blank\" rel=\"noopener\">https:\/\/www.youtube.com\/watch?v=7DSJPVHFROS<\/a><\/p>\n<p class=\"\" data-start=\"752\" data-end=\"782\">Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math n\u1ed5i b\u1eadt v\u1edbi:<\/p>\n<ul data-start=\"783\" data-end=\"1089\">\n<li class=\"\" data-start=\"783\" data-end=\"870\">\n<p class=\"\" data-start=\"785\" data-end=\"870\">H\u1ec7 th\u1ed1ng h\u00ecnh h\u1ecdc phong ph\u00fa: h\u00ecnh thang, tam gi\u00e1c, h\u00ecnh ch\u1eef nh\u1eadt, v\u00f2ng tr\u00f2n &#8230;<\/p>\n<\/li>\n<li class=\"\" data-start=\"871\" data-end=\"946\">\n<p class=\"\" data-start=\"873\" data-end=\"946\">Ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc tr\u1ef1c quan gi\u00fap b\u1ea1n d\u1ec5 hi\u1ec3u, d\u1ec5 nh\u1edb v\u00e0 \u1ee9ng d\u1ee5ng linh ho\u1ea1t<\/p>\n<\/li>\n<li class=\"\" data-start=\"947\" data-end=\"1033\">\n<p class=\"\" data-start=\"949\" data-end=\"1033\">B\u00e0i h\u1ecdc ho\u00e0n to\u00e0n b\u1eb1ng ti\u1ebfng Anh \u0111\u1ec3 gi\u00fap ph\u00e1t tri\u1ec3n t\u01b0 duy to\u00e1n h\u1ecdc v\u00e0 ng\u00f4n ng\u1eef song song<\/p>\n<\/li>\n<li class=\"\" data-start=\"1034\" data-end=\"1089\">\n<p class=\"\" data-start=\"1036\" data-end=\"1089\">C\u00f3 th\u1ec3 h\u1ecdc m\u1ecdi l\u00fac, m\u1ecdi n\u01a1i, m\u00e0 kh\u00f4ng c\u1ea7n Internet<\/p>\n<\/li>\n<\/ul>\n<p class=\"\" style=\"text-align: center\" data-start=\"1091\" data-end=\"1180\"><em>Gi\u00fap em b\u00e9 c\u1ee7a b\u1ea1n y\u00eau th\u00edch h\u00ecnh h\u1ecdc v\u00e0 t\u1ef1 tin chinh ph\u1ee5c t\u1ea5t c\u1ea3 c\u00e1c h\u00ecnh th\u1ee9c chu vi t\u1eeb h\u00f4m nay!<\/em><\/p>\n<p dir=\"ltr\" style=\"text-align: center\">\n<p class=\"\" style=\"text-align: center\" data-start=\"1182\" data-end=\"1250\">T\u1ea3i xu\u1ed1ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math ngay b\u00e2y gi\u1edd \u0111\u1ec3 h\u1ecdc to\u00e1n h\u1ea1nh ph\u00fac v\u00e0 hi\u1ec7u qu\u1ea3!<\/p>\n<p class=\"\" data-start=\"1182\" data-end=\"1250\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/storage_web\/12-12-2022_01:16:45_monkey-math.jpg\" alt=\"Shining Home - Gia \u0111\u00ecnh Anh Ng\u1eef Math - \u1ee8ng d\u1ee5ng h\u1ecdc to\u00e1n b\u1eb1ng ti\u1ebfng Anh. (\u1ea2nh: Kh\u1ec9)\" width=\"100%\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Thuc_hanh_chu_vi_chu_vi_hinh_thang\"><\/span>Th\u1ef1c h\u00e0nh chu vi chu vi h\u00ecnh thang<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Sau khi n\u1eafm b\u1eaft c\u00f4ng th\u1ee9c v\u00e0 ki\u1ebfn th\u1ee9c v\u1ec1 chu vi c\u1ee7a h\u00ecnh thang, \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp th\u1ef1c h\u00e0nh \u0111\u1ec3 h\u1ecd th\u1ef1c h\u00e0nh c\u00f9ng nhau.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tap_the_duc_voi_cac_giai_phap\"><\/span>T\u1eadp th\u1ec3 d\u1ee5c v\u1edbi c\u00e1c gi\u1ea3i ph\u00e1p<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 1: T\u00ednh chu vi c\u1ee7a h\u00ecnh thang, bi\u1ebft \u0111\u00e1y l\u1edbn t\u1edbi 12 cm; \u0110\u00e1y c\u1ee7a em b\u00e9 l\u00e0 10 cm v\u00e0 hai b\u00ean t\u01b0\u01a1ng \u1ee9ng v\u1edbi 7 cm v\u00e0 8 cm<\/p>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p:<\/p>\n<p dir=\"ltr\">Chu vi h\u00ecnh thang l\u00e0:<\/p>\n<p dir=\"ltr\">12 + 10 + 7 + 8 = 37 (cm)<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: 37cm<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 2: H\u00ecnh thang t\u1ef7 l\u1ec7 c\u00f3 chi\u1ec1u d\u00e0i hai c\u1ea1nh v\u00e0 chi\u1ec1u cao l\u1ea7n l\u01b0\u1ee3t l\u00e0 40m, 30m v\u00e0 25m v\u1edbi chu vi:<\/p>\n<table style=\"border-collapse: collapse;width: 100%\">\n<tr>\n<td>\n<p dir=\"ltr\">A. 95m<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">B. 120m<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p dir=\"ltr\">C. 2 875m<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">D. 2 8750m<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p:<\/p>\n<p dir=\"ltr\">Chu vi c\u1ee7a h\u00ecnh thang l\u00e0<\/p>\n<p dir=\"ltr\">40 + 30 + (2 x25)<\/p>\n<p dir=\"ltr\">= 40 + 30 + 50<\/p>\n<p dir=\"ltr\">= 120m<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: 120m<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 3: T\u00ednh chi\u1ec1u d\u00e0i c\u1ee7a h\u00ecnh thang v\u1edbi hai c\u1ea1nh b\u1eb1ng nhau bi\u1ebft chu vi c\u1ee7a h\u00ecnh thang l\u00e0 68cm v\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a hai c\u1ea1nh d\u01b0\u1edbi l\u1ea7n l\u01b0\u1ee3t l\u00e0 20cm v\u00e0 26cm.<\/p>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p:<\/p>\n<p dir=\"ltr\">T\u1ed5ng chi\u1ec1u d\u00e0i c\u1ee7a hai c\u1ea1nh c\u1ee7a h\u00ecnh thang l\u00e0:<\/p>\n<p dir=\"ltr\">68 &#8211; 20 &#8211; 26 = 22 (cm)<\/p>\n<p dir=\"ltr\">\u0110\u1ed9 d\u00e0i b\u00ean c\u1ee7a h\u00ecnh thang l\u00e0:<\/p>\n<p dir=\"ltr\">22: 2 = 11 (cm)<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: 11cm<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 4: M\u1ed9t h\u00ecnh thang h\u00ecnh thang c\u00f3 chu vi chu vi h\u00ecnh vu\u00f4ng 4cm.<\/p>\n<p dir=\"ltr\">Chi\u1ec1u d\u00e0i c\u1ee7a \u0111\u00e1y c\u1ee7a h\u00ecnh thang l\u00e0 3cm, 5cm.<\/p>\n<p dir=\"ltr\">Chi\u1ec1u d\u00e0i b\u00ean c\u1ee7a h\u00ecnh thang t\u1ef7 l\u1ec7 \u0111\u00f3 l\u00e0 &#8230; cm.<\/p>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p:<\/p>\n<p dir=\"ltr\">Chu vi c\u1ee7a h\u00ecnh vu\u00f4ng 4cm l\u00e0:<\/p>\n<p dir=\"ltr\">4 x 4 = 16 (cm)<\/p>\n<p dir=\"ltr\">Chi\u1ec1u d\u00e0i c\u1ee7a hai m\u1eb7t c\u1ee7a h\u00ecnh thang l\u00e0:<\/p>\n<p dir=\"ltr\">16 &#8211; 5 &#8211; 3 = 8 (cm)<\/p>\n<p dir=\"ltr\">Hai b\u00ean b\u1eb1ng nhau<\/p>\n<p dir=\"ltr\">\u0110\u1ed9 d\u00e0i b\u00ean l\u00e0:<\/p>\n<p dir=\"ltr\">8: 2 = 4 (cm)<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: 4 cm<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 5: Cung c\u1ea5p m\u1ed9t h\u00ecnh thang v\u1edbi t\u1ed5ng s\u1ed1 hai \u0111\u00e1y b\u1eb1ng 18 dm v\u00e0 chu vi h\u00ecnh thang l\u00e0 340 cm. \u0110\u1ed9 d\u00e0i b\u00ean c\u1ee7a h\u00ecnh thang l\u00e0:<\/p>\n<table style=\"border-collapse: collapse;width: 100%\">\n<tr>\n<td>\n<p dir=\"ltr\">A. 8cm<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">.. 16dm<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p dir=\"ltr\">Con \u0111\u01b0\u1eddng 8 DM<\/p>\n<\/td>\n<td>\n<p dir=\"ltr\">D. 16cm<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p:<\/p>\n<p dir=\"ltr\">Thay \u0111\u1ed5i 340 cm = 34 dm.<\/p>\n<p dir=\"ltr\">T\u1ed5ng chi\u1ec1u d\u00e0i c\u1ee7a hai c\u1ea1nh l\u00e0: 34 &#8211; 18 = 16 dm.<\/p>\n<p dir=\"ltr\">V\u00ec v\u1eady, chi\u1ec1u d\u00e0i c\u1ea1nh c\u1ee7a h\u00ecnh thang l\u00e0: 16: 2 = 8 dm.<\/p>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi: 8dm<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_tu_dong\"><\/span>B\u00e0i t\u1eadp t\u1ef1 \u0111\u1ed9ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">B\u00e0i 1: H\u00ecnh thang c\u00f3 \u0111\u00e1y d\u00e0i 12 cm, \u0111\u00e1y ng\u1eafn 8 cm v\u00e0 chi\u1ec1u cao 5 cm. T\u00ednh chu vi c\u1ee7a h\u00ecnh thang n\u00e0y.<\/p>\n<p dir=\"ltr\">B\u00e0i 2: H\u00ecnh thang c\u00f3 \u0111\u00e1y d\u00e0i 15 cm, \u0111\u00e1y ng\u1eafn 10 cm v\u00e0 chi\u1ec1u cao 6 cm. T\u00ednh chu vi c\u1ee7a n\u00f3.<\/p>\n<p dir=\"ltr\">B\u00e0i 3: M\u1ed9t h\u00ecnh thang c\u00f3 chu vi 48 cm v\u00e0 \u0111\u00e1y d\u00e0i g\u1ea5p \u0111\u00f4i so v\u1edbi \u0111\u00e1y ng\u1eafn. T\u00ednh chi\u1ec1u d\u00e0i c\u1ee7a \u0111\u00e1y d\u00e0i v\u00e0 \u0111\u00e1y ng\u1eafn.<\/p>\n<p dir=\"ltr\">B\u00e0i 4: H\u00ecnh thang c\u00f3 chu vi 36 cm. \u0110\u00e1y d\u00e0i 10 cm v\u00e0 \u0111\u00e1y ng\u1eafn l\u00e0 6 cm. T\u00ednh chi\u1ec1u cao c\u1ee7a n\u00f3.<\/p>\n<p dir=\"ltr\">B\u00e0i 5: H\u00ecnh thang c\u00f3 chu vi 40 cm, \u0111\u00e1y d\u00e0i 14 cm v\u00e0 \u0111\u00e1y ng\u1eafn 8 cm. T\u00ednh chi\u1ec1u cao c\u1ee7a n\u00f3.<\/p>\n<p dir=\"ltr\">B\u00e0i h\u1ecdc 6: Cho bi\u1ebft chu vi h\u00ecnh thang l\u00e0 30 cm v\u00e0 \u0111\u00e1y ng\u1eafn b\u1eb1ng m\u1ed9t n\u1eeda \u0111\u00e1y. T\u00ednh to\u00e1n \u0111\u00e1y d\u00e0i v\u00e0 \u0111\u00e1y ng\u1eafn.<\/p>\n<p dir=\"ltr\">B\u00e0i 7: M\u1ed9t h\u00ecnh thang c\u00f3 chu vi 24 cm v\u00e0 \u0111\u00e1y ng\u1eafn l\u00e0 m\u1ed9t n\u1eeda \u0111\u00e1y d\u00e0i. T\u00ednh to\u00e1n \u0111\u00e1y d\u00e0i v\u00e0 \u0111\u00e1y ng\u1eafn.<\/p>\n<p dir=\"ltr\">B\u00e0i 8: H\u00ecnh thang c\u00f3 chu vi 56cm v\u00e0 chi\u1ec1u cao 8 cm. T\u00ednh t\u1eeb \u0111\u00e1y d\u00e0i v\u00e0 \u0111\u00e1y ng\u1eafn c\u1ee7a n\u00f3.<\/p>\n<p dir=\"ltr\">B\u00e0i 9: H\u00ecnh thang c\u00f3 chu vi 45 m v\u00e0 c\u01a1 s\u1edf ng\u1eafn 9 cm. T\u00ednh ph\u1ea7n d\u01b0\u1edbi v\u00e0 chi\u1ec1u cao d\u00e0i c\u1ee7a n\u00f3.<\/p>\n<p dir=\"ltr\">B\u00e0i 10: M\u1ed9t h\u00ecnh thang c\u00f3 chu vi 72 cm v\u00e0 \u0111\u00e1y d\u00e0i h\u01a1n ba l\u1ea7n so v\u1edbi \u0111\u00e1y ng\u1eafn. T\u00ednh chi\u1ec1u d\u00e0i c\u1ee7a \u0111\u00e1y d\u00e0i v\u00e0 \u0111\u00e1y ng\u1eafn.<\/p>\n<p dir=\"ltr\">B\u00e0i 11: \u0110\u1ed1i v\u1edbi h\u00ecnh thang v\u1edbi hai m\u1eb7t d\u01b0\u1edbi c\u00f9ng l\u00e0 6cm v\u00e0 4cm. Chi\u1ec1u d\u00e0i c\u1ee7a b\u00ean l\u00e0 m\u1ed9t n\u1eeda t\u1ed5ng chi\u1ec1u d\u00e0i c\u1ee7a \u0111\u00e1y. Chu vi c\u1ee7a h\u00ecnh thang \u0111\u00f3, bi\u1ebft r\u1eb1ng h\u00ecnh thang c\u00f3 hai m\u1eb7t b\u1eb1ng nhau?<\/p>\n<p dir=\"ltr\">B\u00e0i 12: T\u00ednh chu vi h\u00ecnh thang:<\/p>\n<p dir=\"ltr\">A, chi\u1ec1u d\u00e0i c\u1ee7a 2 \u0111\u00e1y t\u01b0\u01a1ng \u1ee9ng l\u1ea7n l\u01b0\u1ee3t l\u00e0 12cm v\u00e0 23cm; Hai b\u00ean t\u01b0\u01a1ng \u1ee9ng l\u00e0 14cm v\u00e0 17cm<\/p>\n<p dir=\"ltr\">B, chi\u1ec1u d\u00e0i d\u01b0\u1edbi c\u00f9ng l\u00e0 30cm v\u00e0 4dm t\u01b0\u01a1ng \u1ee9ng; Hai b\u00ean l\u1ea7n l\u01b0\u1ee3t l\u00e0 10dm v\u00e0 7dm.<\/p>\n<p dir=\"ltr\">\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>\n<p dir=\"ltr\">Tr\u00ean \u0111\u00e2y l\u00e0 th\u00f4ng tin v\u1ec1 c\u00e1ch t\u00ednh chu vi c\u1ee7a h\u00ecnh thang \u0111\u1ec3 bi\u1ebft chi ti\u1ebft cho m\u1ecdi ng\u01b0\u1eddi tham kh\u1ea3o. \u0110\u00e2y kh\u00f4ng ch\u1ec9 l\u00e0 ki\u1ebfn th\u1ee9c \u1ee9ng d\u1ee5ng trong to\u00e1n h\u1ecdc, m\u00e0 c\u00f2n trong th\u1ef1c t\u1ebf r\u1ea5t nhi\u1ec1u. Do \u0111\u00f3, hi\u1ec3u \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n n\u00e0y s\u1ebd gi\u00fap r\u1ea5t nhi\u1ec1u trong vi\u1ec7c h\u1ecdc t\u1eadp, l\u00e0m vi\u1ec7c v\u00e0 \u0111o l\u01b0\u1eddng.<\/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>Trapezoid l\u00e0 m\u1ed9t t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t, m\u1ed9t trong nh\u1eefng h\u00ecnh h\u1ecdc ph\u1ed5 bi\u1ebfn ng\u00e0y nay. \u0110\u1ec3 bi\u1ebft c\u00e1ch t\u00ednh chu vi c\u1ee7a b\u00e0i t\u1eadp b\u00ecnh th\u01b0\u1eddng, vu\u00f4ng, c\u00e2n v\u00e0 chi ti\u1ebft, n\u1ed9i dung Trapezoid l\u00e0 g\u00ec? Trapezoid l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i to\u00e1n h\u1ecdc c\u01a1 b\u1ea3n. H\u00e3y t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 h\u00ecnh thang ngay&#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-38025","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/38025","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=38025"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/38025\/revisions"}],"predecessor-version":[{"id":38186,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/38025\/revisions\/38186"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=38025"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=38025"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=38025"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}