题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172403-95242.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172404-16493.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172404-17400.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172404-17400.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172403-95242.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172404-46672.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172404-17400.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172403-95242.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172404-17400.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172404-29507.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172405-32429.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172405-71247.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172404-17400.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172405-58205.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172404-46672.gif)
得
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172405-74145.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172405-45477.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172406-75143.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172404-17400.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172404-29507.gif)
(2)由条件可设
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172404-17400.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172406-11485.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172406-52257.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172406-59898.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172407-74102.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172407-62710.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172407-71829.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172406-75143.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172407-57927.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172407-84265.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172406-75143.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172404-17400.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172405-32429.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172405-71247.gif)
核心考点
举一反三
那么它的对角线具有什么关系?为什么?
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172352-49297.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172352-35360.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172352-45026.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172353-94176.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172334-76458.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172334-28367.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172335-67950.gif)
若点
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172335-50287.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172335-99951.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172335-19883.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022172336-38885.gif)
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