如图,
是半圆上一点,
是直径,将弧
沿
翻折交
于点
,再将弧
沿
翻折交
于点
,若
是弧
的中点,
,则阴影部分面积为__ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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更新时间:2022-02-25 16:05:51
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