{"id":7557,"date":"2021-11-20T14:02:16","date_gmt":"2021-11-20T07:02:16","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=7557"},"modified":"2021-11-20T17:13:36","modified_gmt":"2021-11-20T10:13:36","slug":"vi-sao-khe-ho-cua-hai-qua-cau-lai-bang-nhau","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/vi-sao-khe-ho-cua-hai-qua-cau-lai-bang-nhau\/","title":{"rendered":"V\u00ec sao khe h\u1edf c\u1ee7a hai qu\u1ea3 c\u1ea7u l\u1ea1i b\u1eb1ng nhau?"},"content":{"rendered":"\n

M\u1ed9t th\u1ea7y gi\u00e1o d\u1ea1y to\u00e1n \u0111\u00e3 \u0111\u1eb7t ra cho h\u1ecdc sinh<\/a> m\u1ed9t b\u00e0i to\u00e1n. Gi\u1ea3 s\u1eed ta ph\u1ea3i \u0111\u00e1nh \u0111ai Tr\u00e1i \u0110\u1ea5t v\u00e0 m\u1ed9t qu\u1ea3 c\u1ea7u nh\u1ecf. Hai c\u00e1i \u0111ai n\u00e0y ph\u1ea3i kh\u00f4ng l\u1edbn, kh\u00f4ng nh\u1ecf qu\u00e1 m\u00e0 ph\u1ea3i l\u1ed3ng kh\u00edt v\u00e0o hai qu\u1ea3 c\u1ea7u. Do kh\u00f4ng c\u1ea9n th\u1eadn n\u00ean ng\u01b0\u1eddi ta \u0111\u00e3 l\u00e0m t\u0103ng \u0111\u1ed9 d\u00e0i c\u1ee7a m\u1ed7i \u0111ai l\u00ean 1 m\u00e9t. N\u1ebfu \u0111\u00e1nh \u0111ai hai qu\u1ea3 c\u1ea7u b\u1eb1ng c\u00e1c c\u00e1i \u0111ai n\u00f3i tr\u00ean th\u00ec khe h\u1edf (gi\u1eefa \u0111ai v\u00e0 qu\u1ea3 c\u1ea7u) \u1edf qu\u1ea3 c\u1ea7u n\u00e0o l\u1edbn h\u01a1n: \u1edf Tr\u00e1i \u0110\u1ea5t hay \u1edf qu\u1ea3 c\u1ea7u nh\u1ecf.<\/p>\n\n\n\n

Nhi\u1ec1u h\u1ecdc sinh<\/a> \u0111\u00e3 nhao nhao tr\u1ea3 l\u1eddi \u201c\u0111\u01b0\u1eddng nhi\u00ean l\u00e0 \u1edf qu\u1ea3 c\u1ea7u nh\u1ecf c\u00f3 khe h\u1edf l\u1edbn h\u01a1n\u201d. C\u00e1c h\u1ecdc sinh<\/a> \u0111\u00e3 gi\u1ea3i th\u00edch l\u00ed do v\u1ec1 s\u1ef1 kh\u1eb3ng \u0111\u1ecbnh c\u1ee7a h\u1ecd nh\u01b0 sau: Tr\u00e1i \u0110\u1ea5t c\u00f3 b\u00e1n k\u00ednh r\u1ea5t l\u1edbn n\u00ean \u0111\u01b0\u1eddng chu vi c\u1ee7a Tr\u00e1i \u0110\u1ea5t \u1edf \u0111\u01b0\u1eddng x\u00edch \u0111\u1ea1o s\u1ebd r\u1ea5t d\u00e0i, cho n\u00ean n\u1ebfu t\u0103ng \u0111\u1ed9 d\u00e0i c\u1ee7a chu vi 1 m\u00e9t th\u00ec so v\u1edbi b\u00e1n k\u00ednh Tr\u00e1i \u0110\u1ea5t chi\u1ec1u d\u00e0i 1 m\u00e9t c\u00f3 ngh\u0129a g\u00ec? C\u00f2n v\u1edbi m\u1ed9t qu\u1ea3 c\u1ea7u nh\u1ecf b\u00e1n k\u00ednh ch\u01b0a \u0111\u1ebfn 1 m\u00e9t m\u00e0 chu vi t\u0103ng th\u00eam \u0111\u1ed9 d\u00e0i 1 m\u00e9t, th\u00ec r\u00f5 r\u00e0ng v\u1edbi c\u00e1i \u0111ai n\u00e0y th\u00ec khe h\u1edf gi\u1eefa c\u00e1i \u0111ai v\u00e0 qu\u1ea3 c\u1ea7u ch\u1eafc s\u1ebd l\u1edbn l\u1eafm.<\/p>\n\n\n\n

Nh\u01b0ng c\u00e2u tr\u1ea3 l\u1eddi n\u00e0y l\u00e0 ho\u00e0n to\u00e0n sai. Th\u1ef1c t\u1ebf khe h\u1edf gi\u1eefa \u0111ai v\u00e0 qu\u1ea3 c\u1ea7u \u1edf Tr\u00e1i \u0110\u1ea5t v\u00e0 qu\u1ea3 c\u1ea7u nh\u1ecf l\u00e0 nh\u01b0 nhau. T\u1ea1i sao v\u1eady? Ta s\u1ebd ti\u1ebfn h\u00e0nh v\u00e0i ph\u00e9p t\u00ednh to\u00e1n th\u00ec s\u1ebd th\u1ea5y ngay:<\/p>\n\n\n\n

Gi\u1ea3 s\u1eed Tr\u00e1i \u0110\u1ea5t c\u00f3 chu vi L; c\u00f2n v\u1edbi qu\u1ea3 c\u1ea7u nh\u1ecf c\u00f3 chu vi . Khi t\u0103ng \u0111\u1ed9 d\u00e0i c\u1ee7a m\u1ed7i c\u00e1i \u0111ai th\u00eam 1 m\u00e9t th\u00ec chu vi c\u1ee7a Tr\u00e1i \u0110\u1ea5t v\u00e0 qu\u1ea3 c\u1ea7u nh\u1ecf l\u00e0 L + 1 v\u00e0 + 1. Khi chu vi t\u0103ng th\u00eam 1 m\u00e9t \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a m\u1ed7i qu\u1ea3 c\u1ea7u l\u00e0 v\u00e0 v\u00e0 s\u1ef1 sai kh\u00e1c c\u1ee7a \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a \u0111ai v\u00e0 \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a c\u00e1c qu\u1ea3 c\u1ea7u s\u1ebd t\u1ea1o n\u00ean khe h\u1edf gi\u1eefa c\u00e1i \u0111ai v\u00e0 qu\u1ea3 c\u1ea7u. Ta s\u1ebd th\u1ea5y \u1edf Tr\u00e1i \u0110\u1ea5t th\u00ec khe h\u1edf s\u1ebd l\u00e0<\/p>\n\n\n\n

C\u00f2n \u1edf qu\u1ea3 c\u1ea7u th\u00ec<\/p>\n\n\n\n

B\u1ea1n xem c\u00f3 ph\u1ea3i c\u00e1c khe h\u1edf l\u00e0 nh\u01b0 nhau kh\u00f4ng?<\/p>\n\n\n\n

T\u1eeb kho\u00e1: H\u00ecnh c\u1ea7u; Chu vi; \u0110\u01b0\u1eddng k\u00ednh.<\/p>\n\n\n\n

<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"

M\u1ed9t th\u1ea7y gi\u00e1o d\u1ea1y to\u00e1n \u0111\u00e3 \u0111\u1eb7t ra cho h\u1ecdc sinh m\u1ed9t b\u00e0i to\u00e1n. Gi\u1ea3 s\u1eed ta ph\u1ea3i \u0111\u00e1nh \u0111ai Tr\u00e1i \u0110\u1ea5t v\u00e0 m\u1ed9t qu\u1ea3 c\u1ea7u nh\u1ecf. Hai c\u00e1i \u0111ai n\u00e0y ph\u1ea3i kh\u00f4ng l\u1edbn, kh\u00f4ng nh\u1ecf qu\u00e1 m\u00e0 ph\u1ea3i l\u1ed3ng kh\u00edt v\u00e0o hai qu\u1ea3 c\u1ea7u. Do kh\u00f4ng c\u1ea9n th\u1eadn n\u00ean ng\u01b0\u1eddi ta \u0111\u00e3 l\u00e0m t\u0103ng […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,9],"tags":[],"class_list":["post-7557","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-toan-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7557","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=7557"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7557\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}