如图,在正六边形
中,分别以
、
为圆心,以边长为半径作弧,图中阴影部分的面积为
,则
长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e0166cef87d437ba03524bbdb61288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/d86ea7d7-89ff-4596-b631-acab6f3ce048.png?resizew=131)
更新时间:2021-03-09 08:57:10
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【推荐2】下面给出六个命题:①各角相等的圆内接多边形是正多边形;②各边相等的圆内接多边形是正多边形;③正多边形是中心对称图形;④各角均为
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【推荐1】如图,在Rt∆ABC中,已知∠BCA=90º,∠BAC=30º,AB=6cm . 把∆ABC以点B为中心逆时针旋转,使点C旋转至AB边延长线上的C′处,那么AC边转过的图形(图中阴影部分)的面积是________ cm2.
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【推荐2】如图,在边长为6的菱形OABC中,∠AOC=60°,以顶点O为圆心、对角线OB的长为半径作弧,与射线OA,OC分别交于点D,E,则图中阴影部分的面积为_____ .
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