题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070926-15434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070927-13459.png)
答案
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070927-85834.png)
又∵
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070927-33733.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070927-51786.png)
在△
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070926-15434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070928-72621.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070928-21693.png)
∴△
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070926-15434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070928-72621.png)
∴BC=DE. ……………………………………………………… 5分
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070926-15434.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070928-72621.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070913-54873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070913-73337.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070913-69692.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070913-48718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070914-75473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070914-53371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070914-13951.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070913-69692.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070914-22735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070915-91386.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070915-91386.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070915-98094.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070915-25615.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070915-90051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070915-40804.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070916-73442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070916-59070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070916-82889.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070916-59246.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070917-25094.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070917-55953.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070905-65472.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070905-39516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070905-16940.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070906-81822.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070905-39516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070906-91806.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070906-89655.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070906-77126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070907-55458.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070907-61651.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103070902-98770.png)
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