如图,在扇形
中,
平分
交
于点
,点
为半径
上一动点.若
,则阴影部分周长的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa3a310c1f8a5af35dc3328d874e18e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f04901530b3cfdd7db2188332cc2bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ba1df94176a1f769c7a0a12bf357fb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/9886c542-3f71-432d-b64c-cbe6d25b224a.png?resizew=147)
A.![]() | B.![]() | C.![]() | D.![]() |
2023·山东临沂·二模 查看更多[5]
2023年山东省临沂市河东区中考二模数学试题(已下线)专题2.52 圆(全章分层练习)(培优练)-2023-2024学年九年级数学上册基础知识专项突破讲与练(苏科版)新疆维吾尔自治区乌鲁木齐市第二中学2023-2024学年九年级上学期期末数学试题(已下线)专题24.41 圆(全章分层练习)(培优练)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)31-与圆有关的计算
更新时间:2023-06-07 23:22:48
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【推荐1】如图,正方形
的边长为
,
分别为
上的点,
,
分别与
交于点
,
为
的中点,
交
于点
,连接
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【推荐1】如图,斜边BC长为
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【推荐2】如图,矩形ABCD的外接圆O与水平地面有唯一交点A,圆O的半径为4,且
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