题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173434-66666.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173434-10033.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173435-76199.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173435-11565.gif)
(1)判断此三角形的形状;
(2)在
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173435-38032.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173435-42477.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173435-69722.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173435-42477.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173435-34252.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173435-70721.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173436-82641.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173436-94670.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173436-54197.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173436-16897.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173436-10713.gif)
(2)设点
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173435-42477.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173437-55552.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173435-69722.gif)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173437-24963.gif)
解得
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173437-50047.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173437-59603.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173435-42477.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173435-34252.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173426-28285.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173426-33197.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173426-15123.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173416-60220.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173416-12882.gif)
用解析法证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173417-89085.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173410-62892.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173410-10050.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173410-51098.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173411-46937.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173411-22233.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173411-26417.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173411-72900.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173412-53628.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173412-26660.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173405-85209.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173405-33465.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173405-78117.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173405-69806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173401-10229.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173401-63144.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022173401-49294.gif)
A.![]() | B.![]() | C.![]() | D.以上都不对 |
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