题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004217-35582.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004217-24109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004217-89157.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004217-23624.jpg)
(I)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004217-12164.png)
(II)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004218-19153.png)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004218-36076.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004218-91626.png)
由AB是
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004218-36076.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004218-91330.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004219-40063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004219-53795.png)
(II)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004219-87911.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004219-46036.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004220-82136.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004220-21369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004220-98948.png)
第一问由切线联想到弦切角定理,进而转化到直角三角形中来解决角相等问题;第二问主要是在直角三角形中由
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004220-86927.png)
【考点定位】本题考查平面几何弦切角定理,全等三角形知识以及相似三角形知识,在处理几何量的关系时运用等量代换。。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004211-16155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004211-13026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004211-55675.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004211-74644.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004212-25616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004202-13986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004202-62168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004202-96581.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004203-15973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004203-38341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004203-33457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004203-62912.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004203-14790.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004203-13378.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004203-49255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004203-67033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004204-66711.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004150-14710.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004150-72946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004150-75277.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004150-51955.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004150-40724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004151-87874.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004151-73286.png)
求证:△
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004151-56114.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004151-43983.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004152-77529.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004146-91116.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004140-45926.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004140-66842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004140-50682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004140-14668.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004141-65197.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004141-76778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004141-73058.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004141-75703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004141-75703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004141-85284.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004142-63385.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004142-20942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191108/20191108004142-45514.png)
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