题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051746-64941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051746-78757.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051746-12502.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051747-34831.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051747-96137.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051747-72115.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051747-16902.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051748-84299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051748-52041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051748-19305.png)
从而
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051748-34347.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051749-85436.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051749-35947.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051749-65747.png)
(2)由
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051749-60356.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051749-34882.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051750-49881.png)
∵
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051750-75627.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051750-16055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051750-65250.png)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051740-10903.png)
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051740-96887.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051740-51472.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051740-96887.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051740-51472.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051740-96887.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051735-60206.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051735-30767.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051727-33583.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051727-25699.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051727-32669.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051727-15376.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051719-74070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051720-77250.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051720-47402.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051720-85368.png)
(1)求边长
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051720-24627.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051720-85307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051721-47986.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051715-30685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051715-96352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051715-56910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051715-83179.png)
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