题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040014-86005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040014-41626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040015-83348.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040015-62719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040015-62719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040015-17801.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040015-44896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040016-99589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040014-86005.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040016-61202.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040016-37756.png)
解析
∴∠ACB=90°,
∵∠D=30°,
∴∠A=∠D=30°,
∵BC=2,
∴AB=4.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040008-31868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040009-43257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040009-91798.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040009-43257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040009-60219.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040010-89663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040010-45013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040010-22765.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040010-12113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040011-52459.png)
(1)求证:直线
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040011-82339.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040009-43257.png)
(2)若⊙
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040009-43257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040011-44409.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040002-60155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040002-56211.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040002-15408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040002-63577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040002-63577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040002-29086.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040002-67874.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040002-29086.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040002-63577.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040003-75082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040003-59583.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040003-29936.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040002-67874.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040003-82546.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040003-48056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040003-78392.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040004-23132.png)
(1)线段
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040003-82546.png)
(2)当点
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040003-29936.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040004-54685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040004-61099.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040003-82546.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040002-67874.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040002-60155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040004-54685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040002-60155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040004-61099.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040004-54685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040003-59583.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040004-61099.png)
(3)求出△
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105040004-41664.png)
A.2 | B.4 | C.2和4 | D.以上都不对 |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105035947-81313.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105035942-86554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105035942-32073.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105035943-99543.png)
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