如图,已知⊙
半径为
,从⊙
外点
作⊙
的切线
和
,切点分别为点
和点
,
,则图中阴影部分的面积是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29dbca5bca453dc09e357b15ddb57e58.png)
![](https://img.xkw.com/dksih/QBM/2019/4/22/2187916691152896/2188049337524225/STEM/22f3be17034744b7858a01651aa8d417.png?resizew=161)
更新时间:2019-04-22 11:00:41
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【知识点】 求扇形面积
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【推荐1】正方形ABCD中,点⊙O为对角线的交点,以点C为圆心,以OC为半径作弧,交BC于点F,交CD于点G,以点D为圆心,以AD为半径作弧,交BD于点E,若AB=1,则阴影部分的面积为________ .
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988293082185728/2991282226896896/STEM/87a65f53-4db9-48d6-bf8f-adc0da20adce.png?resizew=189)
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【推荐2】如图,正方形ABCD中,扇形ABC与扇形BCD的弧交于点E,BC=1cm,则图中阴影部分的面积为_______ cm².(结果保留π)
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