题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013055-26039.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013055-36836.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013055-44114.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013048-77860.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013048-39088.png)
A.∠ABC=90° | B.∠BAC=90° | C.AB=AC | D.AC=BC |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013037-86616.png)
(1)求证:A、B、C三点共线;
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013037-35024.png)
(3)已知
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013037-80011.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013037-63921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013037-32302.png)
A.1 | B.![]() | C.![]() | D.2 |
A.a∥b | B.a⊥b |
C.|a|=|b| | D.a+b=a-b |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013006-38399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013007-97203.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013007-51558.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013007-12010.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013007-24503.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013008-13453.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013008-86700.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013008-56335.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013008-45939.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013008-38203.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013009-17068.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105013008-38203.png)
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