如图,正方形
的边长为8,
经过A,B两点,且与边
相切于点M,若点M为
的中点,则
的半径长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
A.![]() | B.![]() | C.![]() | D.5 |
更新时间:2024-05-11 21:36:55
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【推荐1】如图,将n个边长都为2的正方形按如图所示摆放,点A1,A2,…An分别是正方形的中心,则这n个正方形重叠部分的面积之和是( )
![](https://img.xkw.com/dksih/QBM/2014/8/19/1573746000756736/1573746006253568/STEM/414faf56e66e4c64a50cfc9a4dba4817.png)
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A.n | B.n﹣1 | C.(2)n﹣1 | D.n |
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【推荐2】如图,正方形
的顶点A,B在y轴上,反比例函数
的图象经过点C和
的中点E,若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
A.3 | B.4 | C.5 | D.6 |
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【推荐1】如图,在
中,
弦
于点E,
的延长线交弦
所对的优弧于点F.若
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/c7da3f42-a913-4291-9a8f-a1849bcf33a8.png?resizew=144)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd922bed8965a2ba1a7ee623f5d34278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/c7da3f42-a913-4291-9a8f-a1849bcf33a8.png?resizew=144)
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【推荐2】如图,AB是⊙O的直径,点C在⊙O上,CD⊥AB,垂足为D,点E是⊙O上的动点(不与C重合),点F为CE的中点,若AD=2,CD=4,则DF的最大值为( )
![](https://img.xkw.com/dksih/QBM/2022/4/28/2975051256356864/2980629198929920/STEM/b9519137-ac95-4d01-b5b7-e822e9a65d36.png?resizew=136)
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【推荐1】如图,在直角三角形材料
中,
,
,
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/d62f3016-bb12-4783-b54d-3e35be49ac69.jpg?resizew=147)
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【推荐2】如图,过⊙O上一点C作⊙O的切线,交⊙O直径AB的延长线于点D.若∠D=30°,则∠A的度数是( )
![](https://img.xkw.com/dksih/QBM/2021/12/21/2877125931040768/2882916367949824/STEM/5abb8a7c-ab08-4380-b6ca-063f5ecfc81e.png?resizew=198)
![](https://img.xkw.com/dksih/QBM/2021/12/21/2877125931040768/2882916367949824/STEM/5abb8a7c-ab08-4380-b6ca-063f5ecfc81e.png?resizew=198)
A.20° | B.25° | C.30° | D.40° |
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