题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105034506-12752.png)
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的长为16厘米,那么这两圆的圆心距
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105034507-65720.png)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105034508-40240.png)
∴O1O2=O1C+O2C=15+6=21cm,还有一种情况,O1O2=O2C-O1C=15-6=9cm,故答案为21cm或9cm.
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105034508-21518.png)
核心考点
举一反三
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