题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121644-84583.png)
A.40° | B.50° | C.100° | D.130° |
答案
解析
∴∠1=∠2=50°.
故选B
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121634-66226.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121634-18610.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121634-72960.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121635-72360.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121635-71649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121635-65179.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121641-38636.jpg)
A.55° | B.65° | C.75° | D.125° |
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121616-21479.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121616-78579.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121617-24661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121617-34905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121617-24661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121617-11163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121617-32234.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121617-98587.jpg)
A.120° | B.130° | C.140° | D.150° |
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121612-15648.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121612-65195.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121612-28344.png)
。
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121613-82626.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121559-32745.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121559-29682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121600-11838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121600-45329.jpg)
求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021121601-73697.png)
A. 4 | B.3 | C.1 | D.0 |
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