如图,在
中,
,
,
,
平分
,
于点D,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/379d626fa93cf37ad9c808b37cb033a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93380ab8eccc6e6f11bdf19ffc2d4cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d05c329b0a98877e1672af3912633c46.png)
A.24 | B.12 | C.6 | D.3 |
2023·黑龙江佳木斯·三模 查看更多[3]
更新时间:2023-06-21 18:30:09
|
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【推荐1】下列说法:①过一点有且只有一条直线与已知直线垂直;②过一点有且只有一条直线与这条直线平行;③过直线l外一点P向这条直线作垂线,这条垂线段就是点P到直线l的距离;④两个角的两边分别平行,则这两个角相等或互补;⑤无理数都是无限小数.其中正确的个数为( )
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】下列命题中假命题的个数为( )
①过一点有且只有一条直线与已知直线平行;
②过一点有且只有一条直线与已知直线垂直;
③把一个木条固定到墙上需要两颗钉子,其中的数学原理是:两点确定一条直线;
④垂直于同一条直线的两条直线垂直.
A.4个 | B.3个 | C.2个 | D.1个 |
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【推荐1】如图,正方形
的对角线
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相交于点O,
平分
交
于点E.过点E作
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的面积为1,则
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【推荐2】如图,菱形
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交
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【推荐1】有公共顶点且有公共边的两个角的平分线互相垂直,这两个角是( )
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【推荐2】如图,在平行四边形
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