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歡迎您訪問數學考題練習:三角形三邊長分別是5,12,13,它的最短邊上!

數學考題練習:三角形三邊長分別是5,12,13,它的最短邊上

更新時間:2024-01-12 16:28:06作者:貝語網校

三角形三邊長分別是5,12,13,它的最短邊上的高為

A.

B.30

C.13

D.12

試題答案

D

試題解析

由于52+122=132,根據勾股定理逆定理可知此三角形是直角三角形,故知最短邊上的高是12.

解答:∵52+122=132

∴此三角形是直角三角形,

∵5是最短邊,

∴最短邊上的高就是另一直角邊12.

故選D.

點評:本題考查了勾股定理的逆定理,解題的關鍵是先證明三角形是直角三角形.

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