正六边形的边心距是
,则正六边形的边长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
A.![]() | B.1 | C.2 | D.![]() |
更新时间:2021-09-11 16:44:35
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【推荐1】如图,点A,B,C,D,E,F,G,H为
的八等分点,
与
的交点为I.若
的半径为
,则
的长等于( )
![](https://img.xkw.com/dksih/QBM/2021/4/23/2706225524088832/2706307972644864/STEM/faf1fe0d68a64a14aac6b46c03651c3b.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44d5469ad63140e474840575500e901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc29330979e64e99678423e58759779.png)
![](https://img.xkw.com/dksih/QBM/2021/4/23/2706225524088832/2706307972644864/STEM/faf1fe0d68a64a14aac6b46c03651c3b.png?resizew=135)
A.![]() | B.![]() | C.![]() | D.![]() |
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单选题
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适中
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【推荐2】同圆的外切正方形和内接正三角形的边长之比是( )
A.![]() | B.![]() | C.![]() | D.![]() |
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