如图所示,为了测量一个圆形徽章的半径,小明把徽章与直尺相切于点
,水平移动一个含
角的三角尺与徽章相切时停止,三角尺与直尺交于点
.小明测量出
,则这枚徽章的半径是( )
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
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A.![]() | B.![]() | C.![]() | D.4 |
2024·广东梅州·一模 查看更多[1]
更新时间:2024-05-13 14:57:19
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【推荐1】如图,过⊙O上一点C作⊙O的切线,交直径AB的延长线于点D,若∠A=25°,则∠D的度数为( )
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【推荐2】如图,已知
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【推荐1】如图,
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【推荐2】如图,PA、PB、CD均为⊙O的切线,切点分别为A、B、E,若PA= 15,则△PCD的周长为( ).
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