如图,四边形
是一个边长为
的菱形纸片,且
°.现有以下三种方式在纸片剪出一个圆:①直接在菱形纸片上作圆并剪下;②将菱形纸片按如下方式裁剪拼接成一个矩形,再在拼接好的矩形中作圆并剪下;③按如图的方式剪出再拼接成一个圆.三种方式得到的三个最大的圆的半径分别是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/23ba0f78-cdd1-4de1-b6a4-f03107541e14.png?resizew=481)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403124a2ea6e215f22761baba9d766de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/8/23ba0f78-cdd1-4de1-b6a4-f03107541e14.png?resizew=481)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-12-06 23:15:18
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【推荐1】如图,在
中,
,
,
为
边上一动点,以
,
为边作
,则对角线
长度的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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A.2 | B.![]() | C.4 | D.![]() |
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【推荐2】如图,EA⊥AB,BC⊥AB,AB=AE=2BC,D为AB中点,在“①DE=AC;②DE⊥AC;③∠EAF=∠ADE;④∠CAB=30°”这四个结论中,正确的个数有 ( )
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【推荐1】如图,
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相交于点
,
平分
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【推荐2】如图,将一个正方形的四个角截去后使之变成一个正八边形,如果正方形的边长为1,则正八边形的边长为( )
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【推荐1】小红用四根相同长度的木条制作了一个四边形学具(如图①),测得其对角线
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【推荐2】如图,在菱形
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【推荐1】如图,
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【推荐2】如图,已知⊙O圆心是数轴原点,半径为1,∠AOB=45°,点P在数轴上运动,若过点P且与OA平行的直线与⊙O有公共点,设OP=x,则x的取值范围是( )
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