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歡迎您訪問數學考題練習:如圖,AB=AD,C是BD的中點,則下列結論:!

數學考題練習:如圖,AB=AD,C是BD的中點,則下列結論:

更新時間:2024-01-12 14:08:53作者:貝語網校

如圖,AB=AD,C是BD的中點,則下列結論:①AC=AD;②B是AC的中點;③AB=BC=CD;④CD=AC,其中正確的個數有

A.1個

B.2個

C.3個

D.4個

試題答案

D

試題解析

由已知條件可知,AB=AD,則AD=3AB又因為C是BD的中點,則BC=CD,故有AB=BC=CD.再對選項一一進行分析,得到正確結果.

解答:∵AB=AD

∴AD=3AB

∵C是BD的中點

∴BC=CD

∴AB=BC=CD

∴①AC=AD;

②B是AC的中點;

③AB=BC=CD;

④CD=AC.

故選D.

點評:利用中點性質轉化線段之間的倍分關系是解題的關鍵,在不同的情況下靈活選用它的不同表示方法,有利于解題的簡潔性,同時,靈活運用線段的和、差、倍、分轉化線段之間的數量關系也是十分關鍵的一點.

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