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歡迎您訪問數學考題練習:如圖,∠ACB=90°,D為AB的中點,已知A!

數學考題練習:如圖,∠ACB=90°,D為AB的中點,已知A

更新時間:2024-01-12 16:43:54作者:貝語網校

如圖,∠ACB=90°,D為AB的中點,已知AB=4,則CD的長為

A.8

B.4

C.2

D.1

試題答案

C

試題解析

由已知可得CD為△ABC斜邊上的中線,根據直角三角形斜邊上的中線等于斜邊的一半即可求得CD的長.

解答:∵∠ACB=90°,D為AB的中點,

∴CD為AB上的中線

∵AB=4

∴CD=2

故選C.

點評:此題主要考查學生對直角三角形斜邊上的中線等于斜邊的一半的理解.

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