题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014506-86299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014506-49282.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014507-64968.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014507-90731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014507-76634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014507-22865.png)
(1)判断直线
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014508-52042.png)
(2)如果
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014508-37325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014508-87463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014508-86832.png)
答案
解析
试题分析:(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014506-86299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014506-49282.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014507-64968.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014507-90731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014508-67244.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014509-17871.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014509-54371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014507-76634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014509-30103.png)
(2)根据圆的性质,
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014509-25803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014508-37325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014510-46099.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014510-11222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014510-26364.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014510-39247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014508-87463.png)
点评:本题考查直线与圆相切、勾股定理,要求考生掌握勾股定理的内容,会判定直线与圆的位置关系,会判定直线与圆相切
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014500-56999.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014456-33495.png)
(1)求证:AD平分∠BAC;
(2)若BE=2,BD=4,求⊙O的半径.
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014451-31325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014451-77337.png)
①若点B的坐标为(4,0),⊙B的半径为3,试判断⊙A与⊙B的位置关系;
②能否在
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014451-31325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014446-61531.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014446-51404.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014441-38998.png)
A.2
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014441-54490.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014441-54490.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014441-41983.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105014441-21453.png)
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