如图所示,
为矩形,以
为直径作半圆,矩形的另外三边分别与半圆相切,沿着折痕
折叠该矩形,使得点
的对应点
落在
边上,若
,则图中阴影部分的面积为__________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
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2019·四川自贡·三模 查看更多[8]
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更新时间:2023-05-15 15:36:45
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【推荐1】如图,在矩形
中,
,点E,F分别在边
上,且
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处,延长
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【推荐2】如图①,在长方形ABCD中,E点在AD上,并且∠ABE=30°,分别以BE、CE为折痕进行折叠并压平,如图②,若图②中∠AED=n°,则∠BCE的度数为_____ °(用含n的代数式表示).
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【推荐1】如图,在扇形AOB中,
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【推荐2】如图,在平面直角坐标系
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【推荐2】如图,以矩形
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_________ .
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【推荐2】如图,在
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