{"id":13985,"date":"2025-06-05T22:50:45","date_gmt":"2025-06-05T15:50:45","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=13985"},"modified":"2025-07-03T21:20:04","modified_gmt":"2025-07-03T14:20:04","slug":"cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat\/","title":{"rendered":"C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh b\u00ecnh h\u00e0nh ch\u00ednh x\u00e1c 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\/cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat\/#Cong_thuc_tinh_toan_chu_vi_cua_hinh_binh_hanh_la_gi\" >C\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi c\u1ee7a 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\/cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat\/#Cach_tinh_chu_vi_cua_hinh_binh_hanh\" >C\u00e1ch t\u00ednh chu vi 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-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat\/#Mot_so_loai_bai_tap_lam_the_nao_de_tinh_chu_vi_cua_hinh_binh_hanh_thong_thuong\" >M\u1ed9t s\u1ed1 lo\u1ea1i b\u00e0i t\u1eadp l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ednh chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh th\u00f4ng th\u01b0\u1eddng<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat\/#Mau_1_Tinh_chu_vi_thuc_thi_khi_biet_do_dai_cua_cac_canh\" >M\u1eabu 1: T\u00ednh chu vi th\u1ef1c thi khi bi\u1ebft \u0111\u1ed9 d\u00e0i c\u1ee7a c\u00e1c c\u1ea1nh<\/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\/cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat\/#Mau_2_Cho_chu_vi_cua_hinh_binh_hanh_tinh_do_dai_cua_cac_canh_cua_hinh_do\" >M\u1eabu 2: Cho chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, t\u00ednh \u0111\u1ed9 d\u00e0i c\u1ee7a c\u00e1c c\u1ea1nh c\u1ee7a h\u00ecnh \u0111\u00f3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat\/#Bai_tap_3_Kien_thuc_chung_ve_cach_tinh_chu_vi_cua_hinh_binh_hanh\" >B\u00e0i t\u1eadp 3: Ki\u1ebfn th\u1ee9c chung v\u1ec1 c\u00e1ch t\u00ednh chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat\/#Chu_vi_cua_hinh_binh_hanh_cho_em_be_thuc_hanh\" >Chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh cho em b\u00e9 th\u1ef1c h\u00e0nh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat\/#Ap_dung_tinh_toan_hinh_binh_hanh_trong_thuc_te\" >\u00c1p d\u1ee5ng t\u00ednh to\u00e1n h\u00ecnh b\u00ecnh h\u00e0nh trong th\u1ef1c t\u1ebf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat\/#Meo_giup_tre_lam_chu_vi_chu_vi_cua_hinh_binh_hanh\" >M\u1eb9o gi\u00fap tr\u1ebb l\u00e0m chu vi chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<\/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\/cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat\/#Lam_chu_kien_%E2%80%8B%E2%80%8Bthuc_co_ban_va_cong_thuc_tinh_toan_chu_vi_cua_hinh_binh_hanh\" >L\u00e0m ch\u1ee7 ki\u1ebfn \u200b\u200bth\u1ee9c c\u01a1 b\u1ea3n v\u00e0 c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi c\u1ee7a 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-11\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat\/#Thuc_hanh_thuc_hanh_thuong_xuyen_la_dieu_can_thiet\" >Th\u1ef1c h\u00e0nh, th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft<\/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\/cong-thuc-tinh-chu-vi-hinh-binh-hanh-chinh-xac-nhat\/#Tao_su_quan_tam_khi_hoc_toan_cho_tre_em_voi_toan_hoc_khi\" >T\u1ea1o s\u1ef1 quan t\u00e2m khi h\u1ecdc to\u00e1n cho tr\u1ebb em v\u1edbi to\u00e1n h\u1ecdc kh\u1ec9<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>Chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 con \u0111\u01b0\u1eddng bao quanh to\u00e0n b\u1ed9 khu v\u1ef1c c\u1ee7a h\u00ecnh \u1ea3nh. Trong n\u1ed9i dung c\u1ee7a b\u00e0i vi\u1ebft n\u00e0y, kh\u1ec9 s\u1ebd t\u1ed5ng h\u1ee3p v\u00e0 ph\u00e2n t\u00edch c\u00f4ng th\u1ee9c chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh \u0111\u1ec3 tr\u1ebb tham kh\u1ea3o.<\/p>\n<p>                        Xem t\u1ea5t c\u1ea3<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_toan_chu_vi_cua_hinh_binh_hanh_la_gi\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 C = 2 (A + B), trong \u0111\u00f3 A v\u00e0 B l\u00e0 hai m\u1eb7t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh. <\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5, \u0111\u1ed1i v\u1edbi m\u1ed9t h\u00ecnh b\u00ecnh h\u00e0nh ABCD v\u1edbi hai c\u1ea1nh A v\u00e0 B l\u1ea7n l\u01b0\u1ee3t l\u00e0 4 cm v\u00e0 6 cm. Bao nhi\u00eau chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh ABCD?<\/em><\/p>\n<p dir=\"ltr\"><em>\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c \u0111\u1ec3 t\u00ednh chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh m\u00e0 ch\u00fang ta c\u00f3:<\/em><\/p>\n<p dir=\"ltr\"><em>C = (a + b) x 2 = (4 + 6) x 2 = 10 x 2 = 20 cm<\/em><\/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-binh-hanh-1.jpg\" alt=\"C\u00f4ng th\u1ee9c chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Xem ngay: C\u00f4ng th\u1ee9c chu vi ho\u00e0n ch\u1ec9nh nh\u1ea5t<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cach_tinh_chu_vi_cua_hinh_binh_hanh\"><\/span>C\u00e1ch t\u00ednh chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>C\u00f4ng th\u1ee9c cho chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 c = 2 (a + b), trong \u0111\u00f3 a v\u00e0 b l\u00e0 hai m\u1eb7t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh. Mu\u1ed1n t\u00ednh chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, ch\u00fang t\u00f4i th\u1ef1c hi\u1ec7n 3 b\u01b0\u1edbc sau:<\/p>\n<ul>\n<li>B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh hai m\u1eb7t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, c\u00f3 th\u1ec3 l\u00e0 A v\u00e0 B.<\/li>\n<li>B\u01b0\u1edbc 2: \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c C = 2 (A + B) \u0111\u1ec3 t\u00ednh chu vi. Thay v\u00e0o \u0111\u00f3, gi\u00e1 tr\u1ecb c\u1ee7a A v\u00e0 B \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh.<\/li>\n<li>B\u01b0\u1edbc 3: T\u00ednh v\u00e0 x\u00e1c \u0111\u1ecbnh gi\u00e1 tr\u1ecb c\u1ee7a C, t\u1ee9c l\u00e0 chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh.<\/li>\n<\/ul>\n<p>Xem chi ti\u1ebft v\u1ec1 c\u00e1ch t\u00ednh chu vi c\u1ee7a l\u1edbp th\u1ee9 4 trong video d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n<p><a href=\"https:\/\/www.youtube.com\/watch?v=uyqunfa_fdo\" target=\"_blank\" rel=\"noopener\">https:\/\/www.youtube.com\/watch?v=uyqunfa_fdo<\/a><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_loai_bai_tap_lam_the_nao_de_tinh_chu_vi_cua_hinh_binh_hanh_thong_thuong\"><\/span>M\u1ed9t s\u1ed1 lo\u1ea1i b\u00e0i t\u1eadp l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ednh chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh th\u00f4ng th\u01b0\u1eddng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n l\u1edbp 4, v\u1edbi ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, ch\u00fang s\u1ebd quen thu\u1ed9c v\u1edbi c\u00e1c lo\u1ea1i b\u00e0i t\u1eadp 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-binh-hanh-2.jpg\" alt=\"C\u00f3 nhi\u1ec1u lo\u1ea1i b\u00e0i t\u1eadp li\u00ean quan \u0111\u1ebfn chu vi c\u1ee7a h\u00ecnh \u1ea3nh cho tr\u1ebb em th\u1ef1c h\u00e0nh. (\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_thuc_thi_khi_biet_do_dai_cua_cac_canh\"><\/span>M\u1eabu 1: T\u00ednh chu vi th\u1ef1c thi khi bi\u1ebft \u0111\u1ed9 d\u00e0i c\u1ee7a c\u00e1c c\u1ea1nh <span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p: \u0110\u1ec3 t\u00ednh chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, ch\u00fang t\u00f4i \u00e1p d\u1ee5ng ti\u00eau chu\u1ea9n c\u1ee7a c\u00f4ng th\u1ee9c chu vi s\u1ebd b\u1eb1ng 2 l\u1ea7n m\u1ed9t c\u1eb7p c\u1ea1nh g\u1ea7n \u0111\u1ec3 t\u00ecm c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: H\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 b\u1ea5t k\u1ef3 2 c\u1ea1nh n\u00e0o v\u1edbi chi\u1ec1u d\u00e0i t\u01b0\u01a1ng \u1ee9ng l\u00e0 30m v\u00e0 50m. Chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 bao nhi\u00eau?<\/em><\/p>\n<p dir=\"ltr\"><em>Ph\u1ea7n th\u01b0\u1edfng:<\/em><\/p>\n<p dir=\"ltr\"><em>Chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>C = (30 + 50) x 2 = 80 x 20 = 160 (m)<\/em><\/p>\n<p dir=\"ltr\"><em>Tr\u1ea3 l\u1eddi: 160m<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_2_Cho_chu_vi_cua_hinh_binh_hanh_tinh_do_dai_cua_cac_canh_cua_hinh_do\"><\/span>M\u1eabu 2: Cho chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, t\u00ednh \u0111\u1ed9 d\u00e0i c\u1ee7a c\u00e1c c\u1ea1nh c\u1ee7a h\u00ecnh \u0111\u00f3<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 b\u00ecnh h\u00e0nh, ch\u00fang t\u00f4i s\u1ebd suy ra t\u00ednh to\u00e1n c\u1ee7a b\u1ea5t k\u1ef3 \u0111\u1ed9 d\u00e0i c\u1ea1nh n\u00e0o. C\u1ee5 th\u1ec3: c = (a + b) x 2 ==&gt; b = c\/2 &#8211; a ho\u1eb7c a = c\/2 &#8211; b<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5, chu vi c\u1ee7a ABCD b\u1eb1ng 48 cm. T\u00ednh chi\u1ec1u d\u00e0i c\u1ee7a c\u00e1c c\u1ea1nh c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh bi\u1ebft chi\u1ec1u d\u00e0i c\u1ee7a c\u1ea1nh AB d\u00e0i h\u01a1n chi\u1ec1u d\u00e0i c\u1ea1nh ng\u1eafn BD 4 cm.<\/em><\/p>\n<p dir=\"ltr\"><em>H\u01b0\u1edbng d\u1eabn gi\u1ea3i quy\u1ebft<\/em><\/p>\n<p dir=\"ltr\"><em>Chu vi m\u1ed9t n\u1eeda c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>1\/2 c = 48: 2 = 24 cm<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u1ed9 d\u00e0i c\u1ee7a chi\u1ec1u d\u00e0i c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>AB = (24 + 4): 2 = 14 cm<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u1ed9 d\u00e0i c\u1ea1nh ng\u1eafn c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>CD = 24 &#8211; 14 = 10 cm<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_3_Kien_thuc_chung_ve_cach_tinh_chu_vi_cua_hinh_binh_hanh\"><\/span>B\u00e0i t\u1eadp 3: Ki\u1ebfn th\u1ee9c chung v\u1ec1 c\u00e1ch t\u00ednh chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Gi\u1ea3i ph\u00e1p: V\u1edbi lo\u1ea1i b\u00e0i t\u1eadp n\u00e0y, n\u00f3 s\u1ebd c\u00f3 l\u00fd thuy\u1ebft h\u01a1n, c\u0169ng nh\u01b0 k\u1ebft h\u1ee3p c\u00e1c h\u00ecnh th\u1ee9c kh\u00e1c nhau h\u01a1n. N\u00f3 \u0111\u00f2i h\u1ecfi tr\u1ebb ph\u1ea3i \u0111\u1ecdc v\u1ea5n \u0111\u1ec1 m\u1ed9t c\u00e1ch c\u1ea9n th\u1eadn, ph\u00e2n t\u00edch t\u1eebng d\u1eef li\u1ec7u \u0111\u1ec3 c\u00f3 th\u1ec3 \u0111\u01b0a ra c\u00e2u tr\u1ea3 l\u1eddi ch\u00ednh x\u00e1c nh\u1ea5t.<\/p>\n<p dir=\"ltr\">\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Chu_vi_cua_hinh_binh_hanh_cho_em_be_thuc_hanh\"><\/span>Chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh cho em b\u00e9 th\u1ef1c h\u00e0nh<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 li\u00ean quan \u0111\u1ebfn c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh cho tr\u1ebb th\u1ef1c h\u00e0nh c\u00f9ng nhau:<\/p>\n<p dir=\"ltr\">B\u00e0i 1: T\u00ednh chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh ABCD \u1edf tr\u00ean bi\u1ebft AB = 7cm, BC = 5cm<\/p>\n<p dir=\"ltr\">B\u00e0i 2: \u0110\u1eb7t HBH ABCD c\u00f3 chu vi 26cm, c\u1ea1nh A c\u1ee7a H\u00ecnh ABCD = 6cm. T\u00ednh c\u1ea1nh B c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<p dir=\"ltr\">B\u00e0i 3: T\u00ednh chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, bi\u1ebft:<\/p>\n<p dir=\"ltr\">A) chi\u1ec1u d\u00e0i c\u1ea1nh ng\u1eafn l\u00e0 5dm, c\u1ea1nh d\u00e0i 60cm;<\/p>\n<p dir=\"ltr\">b) chi\u1ec1u d\u00e0i c\u1ea1nh ng\u1eafn l\u00e0 15m, c\u1ea1nh d\u00e0i 1000cm;<\/p>\n<p dir=\"ltr\">C) chi\u1ec1u d\u00e0i c\u1ea1nh ng\u1eafn l\u00e0 40cm, c\u1ea1nh d\u00e0i 60cm;<\/p>\n<p dir=\"ltr\">d) chi\u1ec1u d\u00e0i c\u1ea1nh ng\u1eafn l\u00e0 30dm, c\u1ea1nh d\u00e0i 600cm;<\/p>\n<p dir=\"ltr\">B\u00e0i 4: H\u00ecnh b\u00ecnh h\u00e0nh ABCD c\u00f3 chi\u1ec1u d\u00e0i AB l\u00e0 A, chi\u1ec1u d\u00e0i c\u1ee7a c\u1ea1nh BC l\u00e0 b. T\u00ednh chu vi c\u1ee7a HBH ABCD, bi\u1ebft:<\/p>\n<p dir=\"ltr\">a) a = 35cm; B = 12cm<\/p>\n<p dir=\"ltr\">b) a = 26dm; B = 4dm<\/p>\n<p dir=\"ltr\">c) a = 1km 200m; B = 750m<\/p>\n<p dir=\"ltr\">d) a = 12dm; B = 2m<\/p>\n<p dir=\"ltr\">B\u00e0i h\u1ecdc 5: \u0110\u01b0a ra c\u00f4ng th\u1ee9c chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 c = (a + b) x 2. Trong \u0111\u00f3:<\/p>\n<p dir=\"ltr\">A. A l\u00e0 chu vi, B l\u00e0 chi\u1ec1u d\u00e0i c\u1ea1nh ng\u1eafn, C l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a c\u1ea1nh d\u00e0i<\/p>\n<p dir=\"ltr\">B. C l\u00e0 chi\u1ec1u d\u00e0i c\u1ea1nh ng\u1eafn, B l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a chi\u1ec1u d\u00e0i, A l\u00e0 chu vi<\/p>\n<p dir=\"ltr\">C. C l\u00e0 chu vi, A l\u00e0 chi\u1ec1u d\u00e0i c\u1ea1nh ng\u1eafn, B l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a c\u1ea1nh d\u00e0i<\/p>\n<p dir=\"ltr\">B\u00e0i 6: \u0110i\u1ec1u ki\u1ec7n t\u00ednh to\u00e1n chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0:<\/p>\n<p dir=\"ltr\">A. C\u00f3 chi\u1ec1u d\u00e0i \u0111\u00e1y, chi\u1ec1u cao<\/p>\n<p dir=\"ltr\">B. c\u00f3 chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng<\/p>\n<p dir=\"ltr\">C. C\u00f3 m\u1ed9t chi\u1ec1u d\u00e0i c\u1ee7a m\u1ed9t b\u00ean<\/p>\n<p dir=\"ltr\">D. v\u1edbi c\u00e1c c\u1ea1nh ng\u1eafn, c\u00e1c c\u1ea1nh d\u00e0i v\u00e0 \u0111\u01a1n v\u1ecb \u0111o l\u01b0\u1eddng<\/p>\n<p dir=\"ltr\">B\u00e0i 7: M\u1ed9t h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 c\u1ea1nh d\u00e0i 40 cm, c\u1ea1nh ng\u1eafn t\u1edbi 25 cm. T\u00ednh chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh \u0111\u00f3?<\/p>\n<p dir=\"ltr\">B\u00e0i 8: M\u1ed9t h\u00ecnh b\u00ecnh h\u00e0nh v\u1edbi chi\u1ec1u d\u00e0i hai c\u1ea1nh li\u00ean ti\u1ebfp l\u00e0 7 cm v\u00e0 15 cm t\u01b0\u01a1ng \u1ee9ng. T\u00ednh chu vi c\u1ee7a HBH \u0111\u00f3.<\/p>\n<p dir=\"ltr\">B\u00e0i 9: Chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh b\u1eb1ng 48 cm. T\u00ednh chi\u1ec1u d\u00e0i c\u1ee7a c\u00e1c c\u1ea1nh c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh bi\u1ebft chi\u1ec1u d\u00e0i c\u1ee7a c\u1ea1nh d\u00e0i h\u01a1n chi\u1ec1u d\u00e0i c\u1ee7a ng\u1eafn h\u01a1n 4 cm.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ap_dung_tinh_toan_hinh_binh_hanh_trong_thuc_te\"><\/span>\u00c1p d\u1ee5ng t\u00ednh to\u00e1n h\u00ecnh b\u00ecnh h\u00e0nh trong th\u1ef1c t\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">T\u00ednh to\u00e1n chu vi c\u1ee7a HBH \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong m\u1ed9t s\u1ed1 l\u0129nh v\u1ef1c th\u1ef1c t\u1ebf, c\u1ee5 th\u1ec3:<\/p>\n<ul>\n<li dir=\"ltr\">X\u00e2y d\u1ef1ng: Khi thi\u1ebft k\u1ebf \u0111\u1ea5t ho\u1eb7c ng\u00f4i nh\u00e0, c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh gi\u00fap ng\u01b0\u1eddi \u0111\u00f3 t\u00ednh to\u00e1n chi\u1ec1u d\u00e0i c\u1ee7a h\u00e0ng r\u00e0o xung quanh khu\u00f4n vi\u00ean ho\u1eb7c x\u00e1c \u0111\u1ecbnh chi\u1ec1u d\u00e0i c\u1ee7a c\u01a1 s\u1edf trong t\u00f2a nh\u00e0.<\/li>\n<li dir=\"ltr\">C\u00f4ng nghi\u1ec7p \u0111i\u1ec7n: Trong b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n, chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh chi\u1ec1u d\u00e0i c\u1ee7a c\u00e1p \u0111i\u1ec7n ho\u1eb7c d\u00e2y d\u1eabn \u0111i\u1ec7n.<\/li>\n<li dir=\"ltr\">C\u00f4ng nghi\u1ec7p c\u01a1 h\u1ecdc: Trong c\u00e1c th\u00e0nh ph\u1ea7n ch\u1ebf bi\u1ebfn ho\u1eb7c s\u1ea3n xu\u1ea5t kim lo\u1ea1i, chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh \u0111\u1ed9 d\u00e0i c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn ho\u1eb7c \u0111\u01b0\u1eddng h\u00e0n.<\/li>\n<li dir=\"ltr\">\u0110\u01b0\u1eddng x\u00e2y d\u1ef1ng: Trong vi\u1ec7c x\u00e2y d\u1ef1ng con \u0111\u01b0\u1eddng, chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh gi\u00fap \u0111o v\u00e0 t\u00ednh chi\u1ec1u d\u00e0i c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng vi\u1ec1n, s\u1ed1 l\u01b0\u1ee3ng v\u1eadt li\u1ec7u c\u1ea7n thi\u1ebft v\u00e0 th\u1eddi gian \u0111\u1ec3 ho\u00e0n th\u00e0nh d\u1ef1 \u00e1n.<\/li>\n<li dir=\"ltr\">Ng\u00e0nh thi\u1ebft k\u1ebf \u0111\u1ed3 h\u1ecda: Trong thi\u1ebft k\u1ebf \u0111\u1ed3 h\u1ecda v\u00e0 \u0111\u1ed3 h\u1ecda m\u00e1y t\u00ednh, chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o h\u00ecnh \u1ea3nh v\u00e0 h\u00ecnh \u1ea3nh \u0111\u1ed9ng.<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Meo_giup_tre_lam_chu_vi_chu_vi_cua_hinh_binh_hanh\"><\/span>M\u1eb9o gi\u00fap tr\u1ebb l\u00e0m chu vi chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u00fap tr\u1ebb d\u1ec5 d\u00e0ng l\u00e0m ch\u1ee7 chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, kh\u1ec9 \u0111\u00e3 chia s\u1ebb m\u1ed9t s\u1ed1 m\u1eb9o m\u00e0 cha m\u1eb9 c\u00f3 th\u1ec3 \u0111\u0103ng k\u00fd \u0111\u1ec3 h\u1ed7 tr\u1ee3 con c\u00e1i trong ph\u1ea7n sau:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Lam_chu_kien_%E2%80%8B%E2%80%8Bthuc_co_ban_va_cong_thuc_tinh_toan_chu_vi_cua_hinh_binh_hanh\"><\/span>L\u00e0m ch\u1ee7 ki\u1ebfn \u200b\u200bth\u1ee9c c\u01a1 b\u1ea3n v\u00e0 c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp tr\u00ean chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, n\u00f3 \u0111\u00f2i h\u1ecfi tr\u1ebb ph\u1ea3i l\u00e0m ch\u1ee7 ki\u1ebfn \u200b\u200bth\u1ee9c c\u01a1 b\u1ea3n t\u1eeb <em>Kh\u00e1i ni\u1ec7m v\u1ec1 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a h\u00ecnh \u1ea3nh, c\u00f4ng th\u1ee9c chu vi v\u00e0 di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh &#8230; <\/em>\u0110\u1ec3 c\u00f3 th\u1ec3 chinh ph\u1ee5c c\u00e1c v\u1ea5n \u0111\u1ec1 d\u1ec5 d\u00e0ng h\u01a1n.<\/p>\n<p dir=\"ltr\">Ngo\u00e0i ra, cha m\u1eb9 n\u00ean th\u01b0\u1eddng xuy\u00ean ki\u1ec3m tra ki\u1ebfn \u200b\u200bth\u1ee9c c\u1ee7a \u0111\u1ee9a tr\u1ebb n\u00e0y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o em b\u00e9 n\u1eafm b\u1eaft ch\u00fang, c\u0169ng nh\u01b0 n\u1ebfu ch\u00fang qu\u00ean ho\u1eb7c c\u00f3 ph\u1ea7n sai khi c\u1ee7ng c\u1ed1 k\u1ecbp th\u1eddi con c\u00e1i.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Thuc_hanh_thuc_hanh_thuong_xuyen_la_dieu_can_thiet\"><\/span>Th\u1ef1c h\u00e0nh, th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Sau khi n\u1eafm b\u1eaft ki\u1ebfn \u200b\u200bth\u1ee9c l\u00fd thuy\u1ebft, cha m\u1eb9 n\u00ean t\u1ea1o \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 th\u1ef1c h\u00e0nh v\u00e0 th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean. Nh\u01b0 v\u1edbi t\u00f4i \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp trong s\u00e1ch gi\u00e1o khoa, b\u00e0i t\u1eadp, t\u00ecm th\u00eam b\u00e0i t\u1eadp t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao tr\u00ean internet, t\u00ecm hi\u1ec3u th\u00eam ki\u1ebfn \u200b\u200bth\u1ee9c m\u1edbi li\u00ean quan &#8230;<\/p>\n<p dir=\"ltr\">\u0110\u00f3 l\u00e0 th\u1ef1c ti\u1ec5n th\u01b0\u1eddng xuy\u00ean s\u1ebd gi\u00fap c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng suy ngh\u0129 v\u00e0 ti\u1ebfp thu ki\u1ebfn \u200b\u200bth\u1ee9c c\u1ee7a tr\u1ebb em m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 thay v\u00ec ch\u1ec9 h\u1ecdc l\u00fd thuy\u1ebft.<\/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-binh-hanh-4.jpg\" alt=\"Th\u1ef1c h\u00e0nh b\u00e9 m\u1ed7i ng\u00e0y, cha m\u1eb9. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Tham kh\u1ea3o: Chi ti\u1ebft c\u00e1ch t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh c\u1ee7a l\u1edbp 4 v\u00e0 c\u00e1c b\u00e0i t\u1eadp v\u1edbi c\u00e1c gi\u1ea3i ph\u00e1p<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tao_su_quan_tam_khi_hoc_toan_cho_tre_em_voi_toan_hoc_khi\"><\/span>T\u1ea1o s\u1ef1 quan t\u00e2m khi h\u1ecdc to\u00e1n cho tr\u1ebb em v\u1edbi to\u00e1n h\u1ecdc kh\u1ec9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">To\u00e1n h\u1ecdc l\u00e0 m\u1ed9t m\u00f4n h\u1ecdc kh\u00e1 kh\u00f4, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong to\u00e1n h\u1ecdc, tr\u1ebb em d\u1ec5 nh\u00e0m ch\u00e1n h\u01a1n n\u1ebfu kh\u00f4ng c\u00f3 c\u00e1ch h\u1ecdc th\u00edch h\u1ee3p. V\u00ec v\u1eady, \u0111\u1ec3 gi\u00fap cha m\u1eb9 gi\u1ea3i quy\u1ebft kh\u00f3 kh\u0103n n\u00e0y, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math \u0111\u00e3 ra \u0111\u1eddi. \u0110\u00e2y l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng c\u1ee7a gi\u1ea3ng d\u1ea1y to\u00e1n h\u1ecdc tr\u1ef1c tuy\u1ebfn b\u1eb1ng ti\u1ebfng Anh cho tr\u1ebb m\u1eabu gi\u00e1o v\u00e0 tr\u1ebb em ti\u1ec3u h\u1ecdc, \u0111ang \u0111\u01b0\u1ee3c h\u00e0ng tri\u1ec7u ph\u1ee5 huynh tin t\u01b0\u1edfng.<\/p>\n<p dir=\"ltr\">V\u1edbi \u1ee9ng d\u1ee5ng n\u00e0y, n\u00f3 s\u1ebd cung c\u1ea5p h\u01a1n 400 b\u00e0i h\u1ecdc, theo s\u00e1t h\u01a1n 60 ch\u1ee7 \u0111\u1ec1 to\u00e1n h\u1ecdc bao g\u1ed3m h\u00ecnh h\u1ecdc, c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n, v.v &#8230; T\u1ea5t c\u1ea3 \u0111\u1ec1u \u0111\u01b0\u1ee3c d\u1ea1y d\u01b0\u1edbi d\u1ea1ng video, h\u00ecnh \u1ea3nh ho\u1ea1t h\u00ecnh h\u00e0i h\u01b0\u1edbc, gi\u00fap tr\u1ebb d\u1ec5 d\u00e0ng c\u00f3 \u0111\u01b0\u1ee3c ki\u1ebfn \u200b\u200bth\u1ee9c v\u00e0 kh\u00f4ng nh\u00e0m ch\u00e1n khi h\u1ecdc to\u00e1n.<\/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-binh-hanh-3.jpg\" alt=\"Nhi\u1ec1u ho\u1ea1t \u0111\u1ed9ng th\u00fa v\u1ecb khi h\u1ecdc to\u00e1n v\u1edbi to\u00e1n h\u1ecdc kh\u1ec9. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Ch\u01b0a k\u1ec3, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math c\u0169ng \u0111\u00e3 x\u00e2y d\u1ef1ng h\u01a1n 10.000 ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u00e1c nh\u01b0 c\u00e2u \u0111\u1ed1, tr\u00f2 ch\u01a1i, t\u1eadp luy\u1ec7n v\u1edbi cha m\u1eb9 &#8230; \u0110i\u1ec1u n\u00e0y gi\u00fap tr\u1ebb em c\u1ea3 hai h\u1ecdc v\u00e0 ch\u01a1i \u0111\u1ec3 k\u00edch th\u00edch kh\u1ea3 n\u0103ng ngh\u0129 v\u1ec1 to\u00e1n h\u1ecdc, t\u0103ng tr\u00ed nh\u1edb v\u00e0 \u0111\u1eb7c bi\u1ec7t gi\u00fap tr\u1ebb quan t\u00e2m h\u01a1n khi h\u1ecdc to\u00e1n so v\u1edbi s\u00e1ch tr\u00ean s\u00e1ch.<\/p>\n<p dir=\"ltr\">Ngo\u00e0i ra, to\u00e0n b\u1ed9 n\u1ed9i dung b\u00e0i h\u1ecdc theo s\u00e1t ch\u01b0\u01a1ng tr\u00ecnh gi\u00e1o d\u1ee5c m\u1edbi nh\u1ea5t \u0111\u1ec3 h\u1ed7 tr\u1ee3 to\u00e1n h\u1ecdc h\u1ecdc t\u1eadp c\u1ee7a l\u1edbp em b\u00e9 \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 t\u1ed1t h\u01a1n. \u0110\u1ed3ng th\u1eddi, \u0111\u00e2y c\u0169ng l\u00e0 c\u01a1 h\u1ed9i \u0111\u1ec3 gi\u00fap tr\u1ebb h\u1ecdc to\u00e1n v\u00e0 h\u1ecdc ti\u1ebfng Anh m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng v\u00e0 hi\u1ec7u qu\u1ea3 ch\u1ec9 v\u1edbi 2000 VND\/ng\u00e0y.<\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia.monkeyuni.net\/upload\/web\/img\/button_dang-ky-ngay-1.png\" alt=\"\" width=\"185\" height=\"25\"><\/p>\n<\/p>\n<p dir=\"ltr\">Tr\u00ean \u0111\u00e2y l\u00e0 m\u1ed9t b\u1ea3n t\u00f3m t\u1eaft v\u1ec1 ki\u1ebfn \u200b\u200bth\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh. Hy v\u1ecdng, v\u1edbi vi\u1ec7c chia s\u1ebb tr\u00ean kh\u1ec9 \u1edf tr\u00ean s\u1ebd g\u00f3p ph\u1ea7n c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 c\u1ee7a vi\u1ec7c c\u00f3 \u0111\u01b0\u1ee3c v\u00e0 chinh ph\u1ee5c ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc n\u00e0y c\u1ee7a em b\u00e9 \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t!<\/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>Chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 con \u0111\u01b0\u1eddng bao quanh to\u00e0n b\u1ed9 khu v\u1ef1c c\u1ee7a h\u00ecnh \u1ea3nh. Trong n\u1ed9i dung c\u1ee7a b\u00e0i vi\u1ebft n\u00e0y, kh\u1ec9 s\u1ebd t\u1ed5ng h\u1ee3p v\u00e0 ph\u00e2n t\u00edch c\u00f4ng th\u1ee9c chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh \u0111\u1ec3 tr\u1ebb tham kh\u1ea3o. Xem t\u1ea5t c\u1ea3 C\u00f4ng th\u1ee9c t\u00ednh to\u00e1n chu vi c\u1ee7a h\u00ecnh&#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-13985","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/13985","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=13985"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/13985\/revisions"}],"predecessor-version":[{"id":16691,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/13985\/revisions\/16691"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=13985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=13985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=13985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}