如图,四边形
为正方形,且边长为4,点E是
边上一点以
为直径的半圆切
于点F,则
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
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更新时间:2024-02-18 09:08:13
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