如图,在等腰直角三角形ABC中,AB=4.作BM平分∠ABC交AC于点M,点D为射线BM上一点,以点B为旋转中心将线段BD逆时针旋转90°得到线段BE,连接DE.交射线BA于点F,连接AD、AE.当以A、D、M为顶点的三角形与△AEF全等时,DE的长为______ .
![](https://img.xkw.com/dksih/QBM/2021/4/9/2696126111735808/2700997493202944/STEM/37dc1caf-01a5-495c-8b05-d8ce3da7468e.png?resizew=270)
更新时间:2021-04-23 16:04:44
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【推荐1】如图,矩形
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【推荐2】如图,点E、F为正方形
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