题目
题型:不详难度:来源:
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答案
解析
∴10-6=4(厘米),
∴另一圆的半径是4厘米.
故选A.
核心考点
举一反三
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(1)求证:直线PB是⊙O的切线;
(2)求cos∠BCA的值.
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105032004-62187.png)
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