如图,在Rt
中,
,
,
的垂直平分线交
于点D.若
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69550d878381f6e8fb436e88638f070.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/3/e1884053-94a6-40cb-a7bb-e0c0b0aae545.png?resizew=216)
A.3 | B.![]() | C.4 | D.5 |
更新时间:2023-09-03 23:09:21
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【推荐1】如图,在△ABC中,AB=BC=2,∠ABC=90°,D是BC的中点,且它关于AC的对称点是D′,则BD′为( )
![](https://img.xkw.com/dksih/QBM/2020/10/21/2575696807206912/2578786658648064/STEM/f204535d819043d1b0eaaa1c8d6fd648.png?resizew=148)
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【推荐2】在△ABC中,AB=AC,AB的垂直平分线与AC所在直线相交所得的锐角为40°,∠B的度数为( )
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【推荐1】若一个三角形三个内角度数的比为
,且最大的边长为
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【推荐2】如图,在
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【推荐1】如图,在
中,
,以B为圆心,
的长为半径画弧,交
于点D,连接
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的度数是()
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【推荐1】如图,在△ABC中,AB=AC,以点C为圆心,CB长为半径画弧,交AB于点B和点D,再分别以点B,D为圆心,大于
BD长为半径画弧,两弧相交于点M,作射线CM交AB于点E.若AE=2,BE=1,则EC的长度是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/2b80ceed-a3ee-4fec-9036-90b522de400b.png?resizew=133)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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【推荐2】 如图,在矩形纸片
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沿
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上的点F处,
为折痕,连接
并延长交
于点P,若
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