题目
题型:不详难度:来源:
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![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045334-48831.gif)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045335-76529.jpg)
两圆必然内切,设圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045334-48831.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045335-67658.gif)
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![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045336-10039.gif)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045336-98530.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045337-66920.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045335-22633.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045337-66920.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045337-80352.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045334-85157.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045337-20144.gif)
此时
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045335-22633.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045337-80433.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045334-48831.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045323-11625.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045324-91139.gif)
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求四边形
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045250-92814.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023045249-88157.gif)
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