名校
1 . 如图,已知
是半径为1,圆心角为
的扇形,点
分别是半径
及扇形弧上的三个动点(不同于
三点),则
周长的最小值是( )
![](https://img.xkw.com/dksih/QBM/2019/5/18/2206319474827264/2212701948231680/STEM/75c81892-c8fe-4c6f-a69c-09521f7c4231.png?resizew=152)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6c71a0da6a878a5b12bf8a8e784645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c12aeebfa1af16f325c98a43bb08c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/139c0ae68e597571ba72ef727fa9222c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2665479c5fb12e1e728716a30a219c27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://img.xkw.com/dksih/QBM/2019/5/18/2206319474827264/2212701948231680/STEM/75c81892-c8fe-4c6f-a69c-09521f7c4231.png?resizew=152)
A.![]() | B.![]() | C.![]() | D.![]() |
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2019-05-27更新
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3卷引用:辽宁省沈阳市第二中学2019-2020学年度下学期高一年级数学期末考试试题