如图,一个较大的圆内有15个半径为1的小圆,所有的交点都为切点,图中阴影为大圆内但在所有小圆外部分,则阴影部分的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/318c955d-db38-4c93-8c87-07ca63c6e280.png?resizew=141)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/318c955d-db38-4c93-8c87-07ca63c6e280.png?resizew=141)
A.![]() | B.![]() | C.![]() | D.![]() |
2023·湖北武汉·模拟预测 查看更多[2]
更新时间:2023-03-16 16:58:44
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【推荐1】如图
是等边三角形,点
、
分别在边
、
上,
、
交于点
,
,
为
的角平分线,点
在
的延长线上,连接
、
,
,①
;②
;③
;④
;其中说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f0533597752a0efee17b335e548a72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0ae50d5993a332b5cddb022eaa6f1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ba409d76140989e160debe4d132cbe.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91fb87d6d23e13da8c1e701f32fe889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04e3cc53d98c681ee67485f8a960987f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/148abd10-2911-430e-bfb2-3d5e0924d429.png?resizew=158)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】图1是一张菱形纸片
,点
是边
上的点.将该菱形纸片沿
折叠得到图2,
的对应边
恰好落在直线
上.已知
,则四边形
的周长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e737bc35da650eda3825d29799b5f86f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2615b37c8c897eeb9654137bb5439d.png)
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A.24 | B.21 | C.15 | D.12 |
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【推荐1】如图,两个半径都为1的圆形纸片,固定⊙O1,使⊙O2沿着其边缘滚动回到原来位置后运动终止,则⊙O2上的点P运动的路径长为( )
![](https://img.xkw.com/dksih/QBM/2019/12/25/2362563311271936/2362983896670208/STEM/cb1bb74ed9d74518be15709b51403cdf.png?resizew=116)
![](https://img.xkw.com/dksih/QBM/2019/12/25/2362563311271936/2362983896670208/STEM/cb1bb74ed9d74518be15709b51403cdf.png?resizew=116)
A.2π | B.4π | C.6π | D.无法确定 |
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【推荐2】下列图形中,面积最大的是( )
A.边长为6的正三角形; | B.长分别为2.5、6、6.5的三角形; |
C.半径为![]() | D.对角线长为6和8的菱形; |
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【推荐1】如图菱形
的顶点
在
上,过点B的
切线交
的延长线于点D.若
的半径为2,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/31/7229b5d7-4586-4300-a119-a270b404ca6a.png?resizew=156)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/31/7229b5d7-4586-4300-a119-a270b404ca6a.png?resizew=156)
A.3 | B.![]() | C.![]() | D.4 |
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【推荐2】已知
的直径
与弦
的夹角为
,过点
作
的切线交
的延长线于点
,则
等于( )
![](https://img.xkw.com/dksih/QBM/2023/6/22/3265393173864448/3265726901035008/STEM/cdc16db1154245c1936d2235f953ec40.png?resizew=132)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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