已知四边形
中,
,对角线
相交于点O.下列结论一定成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c4dec02850a02a8da56514ffffba952.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989c75a3fd02e4971cab421c88de92f1.png)
A. ![]() | B. ![]() | C. ![]() | D.![]() |
更新时间:2023-11-25 08:56:05
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【知识点】 根据矩形的性质与判定求线段长
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【推荐1】如图,▱ABCD中,对角线AC,BD相交于点O,OA=3,若要使平行四边形ABCD为矩形,则OB的长度为( )
A.4 | B.3 | C.2 | D.1 |
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单选题
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较易
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【推荐2】如图,O是菱形
对角线的交点,
,
,连接
,设
,
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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