如图,在□ABCD中,对角线AC与AB垂直,∠B=72°,BC=
,AC=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求∠BCD,∠D的度数.(2)求AB的长及□ABCD的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619096595112f0340a43b756e114dd3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求∠BCD,∠D的度数.(2)求AB的长及□ABCD的周长.
![](https://img.xkw.com/dksih/QBM/2018/2/13/1881619059736576/1882317420183552/STEM/d432caf7ef174a95bae15c4545278e6c.png?resizew=187)
更新时间:2018-02-14 20:07:30
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【知识点】 平行四边形的性质
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解答题-证明题
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适中
(0.65)
【推荐1】已知:如图,在平行四边形ABCD中,点M在边AD上,且AM=DM.CM、BA的延长线相交于点E.求证:
![](https://img.xkw.com/dksih/QBM/2015/6/16/1573848561483776/1573848567635968/STEM/711b40f1a4374a8db23b54ccc8f35f88.png?resizew=177)
(1)AE=AB;
(2)如果BM平分∠ABC,求证:BM⊥CE.
![](https://img.xkw.com/dksih/QBM/2015/6/16/1573848561483776/1573848567635968/STEM/711b40f1a4374a8db23b54ccc8f35f88.png?resizew=177)
(1)AE=AB;
(2)如果BM平分∠ABC,求证:BM⊥CE.
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解答题-问答题
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适中
(0.65)
【推荐2】如图,在平行四边形
中,过点
作
于点
,点
在
边上,
,连接
,
.若
平分
,
,
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://img.xkw.com/dksih/QBM/2023/9/27/3333934735106048/3340959952609280/STEM/1a87ebfbab974f5cbbbe87df3bf89c9e.png?resizew=262)
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