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歡迎您訪問數學考題練習:下列語句中正確的是!

數學考題練習:下列語句中正確的是

更新時間:2024-01-12 16:46:49作者:貝語網校

下列語句中正確的是

A.如果兩個角的度數加起來是180°,那么這兩個角是鄰補角

B.如果兩條直線被第三條直線所截,那么同位角相等

C.經過一點有且只有一條直線與已知直線垂直

D.連接直線外一點與直線上各點的所有線段中,垂線段最短

試題答案

D

試題解析

根據鄰補角定義、平行線性質、垂線定理、公理進行判斷.

解答:A、若兩個角是兩個獨立的角,和等于180°,但是不是鄰補角,此選項錯誤;

B、這兩條直線也可能不平行,那么同位角不相等,故此選項錯誤;

C、經過直線外一點,有且只有一條直線與已知直線垂直,故此選項錯誤;

D、此句是公理,故此選項正確.

故選D.

點評:解題的關鍵是靈活掌握鄰補角定義、平行線性質、垂線定理、公理.

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