L\u00e0m c\u1ea7u qua s\u00f4ng l\u00e0 m\u1ed9t vi\u1ec7c h\u1ebft s\u1ee9c quan tr\u1ecdng trong ng\u00e0nh giao th\u00f4ng v\u1eadn t\u1ea3i.<\/p>\n\n\n\n
Mu\u1ed1n l\u00e0m c\u1ea7u qua s\u00f4ng l\u1edbn ph\u1ea3i bi\u1ebft ch\u00ednh x\u00e1c b\u1ec1 r\u1ed9ng c\u1ee7a con s\u00f4ng. Nh\u01b0ng l\u00e0m th\u1ebf n\u00e0o \u0111o \u0111\u01b0\u1ee3c b\u1ec1 r\u1ed9ng con s\u00f4ng m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c? Gi\u1ea3 s\u1eed ta c\u1ea7n \u0111o b\u1ec1 r\u1ed9ng c\u1ee7a con s\u00f4ng t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111i\u1ec3m B. Tr\u01b0\u1edbc h\u1ebft ta ch\u1ecdn m\u1ed9t \u0111i\u1ec3m tr\u00ean b\u1edd, v\u00ed d\u1ee5 \u0111i\u1ec3m C c\u00f9ng ph\u00eda v\u1edbi \u0111i\u1ec3m B v\u00e0 ba \u0111i\u1ec3m A, B, C s\u1ebd t\u1ea1o n\u00ean m\u1ed9t tam gi\u00e1c. V\u00ec B, C c\u00f9ng m\u1ed9t ph\u00eda tr\u00ean b\u1edd n\u00ean ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 \u0111o tr\u1ef1c ti\u1ebfp chi\u1ec1u d\u00e0i c\u1ee7a c\u1ea1nh BC. Gi\u1ea3 s\u1eed khi \u0111o, ta \u0111\u01b0\u1ee3c chi\u1ec1u d\u00e0i c\u1ea1nh BC = 521,12 m. C\u00e1c g\u00f3c A v\u00e0 g\u00f3c C c\u00f3 th\u1ec3 \u0111o \u0111\u01b0\u1ee3c ch\u00ednh x\u00e1c nh\u1edd c\u00f3 to\u1ea1 \u0111\u1ed9 kinh v\u0129 v\u00e0<\/p>\n\n\n\n
Trong tam gi\u00e1c ABC, ta bi\u1ebft chi\u1ec1u d\u00e0i c\u1ea1nh BC v\u00e0 c\u00e1c g\u00f3c A v\u00e0 C.<\/p>\n\n\n\n
Theo h\u1ec7 th\u1ee9c l\u01b0\u1ee3ng trong tam gi\u00e1c ta c\u00f3:<\/p>\n\n\n\n
V\u1eady vi\u1ec7c \u0111o \u0111\u1ed9 r\u1ed9ng c\u1ee7a con s\u00f4ng l\u1edbn \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111o r\u1ea5t ch\u00ednh x\u00e1c.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: \u0110\u1ecbnh l\u00ed trong tam gi\u00e1c.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
L\u00e0m c\u1ea7u qua s\u00f4ng l\u00e0 m\u1ed9t vi\u1ec7c h\u1ebft s\u1ee9c quan tr\u1ecdng trong ng\u00e0nh giao th\u00f4ng v\u1eadn t\u1ea3i. Mu\u1ed1n l\u00e0m c\u1ea7u qua s\u00f4ng l\u1edbn ph\u1ea3i bi\u1ebft ch\u00ednh x\u00e1c b\u1ec1 r\u1ed9ng c\u1ee7a con s\u00f4ng. Nh\u01b0ng l\u00e0m th\u1ebf n\u00e0o \u0111o \u0111\u01b0\u1ee3c b\u1ec1 r\u1ed9ng con s\u00f4ng m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c? Gi\u1ea3 s\u1eed ta c\u1ea7n \u0111o b\u1ec1 r\u1ed9ng c\u1ee7a con […]<\/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-7537","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\/7537","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=7537"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7537\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}