在矩形ABCD中,
,
,以A为圆心,AD为半径画弧交线段BC于E,连接DE,则阴影部分的面积为( )
![](https://img.xkw.com/dksih/QBM/2020/12/23/2620407028465664/2623826345115648/STEM/43401a26-080c-4b74-9afc-3dab9335d793.png?resizew=145)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://img.xkw.com/dksih/QBM/2020/12/23/2620407028465664/2623826345115648/STEM/43401a26-080c-4b74-9afc-3dab9335d793.png?resizew=145)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2021-01-15 14:40:09
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【推荐1】如图,在正方形
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【推荐2】如图,在
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③以
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②作直线
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③以
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④连接
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【推荐1】如图,在矩形ABCD中,∠ABD=60°,BD=16,连接BD,将△BCD绕点D顺时针旋转n°(0°<n<90°),得到ΔB′C′D,连接BB′,CC′,延长CC′交BB′于点N,连接AB′,当∠BAB′=∠BNC时,则△ABB′的面积为( )
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【推荐2】如图,矩形
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【推荐1】如图,扇形OAB中,∠AOB=100°,OA=12,C是OB的中点,CD⊥OB交
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【推荐2】如图,在以点O为圆心的半圆中,AB为直径,且AB=4,将该半圆折叠,使点A和点B落在点O处,折痕分别为EC和FD,则图中阴影部分面积为( )
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