题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083055-76431.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083056-46874.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083056-78623.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083056-15787.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083056-13487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083057-20348.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083057-92993.png)
求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083057-29333.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083057-96609.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083057-20348.png)
∴ ∠A=∠ACF, ∠ADE=∠CFE. -------2分
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083057-72713.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083058-89179.png)
∠ADE=∠CFE,
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083057-92993.png)
∴ △ADE≌△CFE. --------4分
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083057-29333.png)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083052-78158.png)
A.2 | B.4 | C.6 | D.8 |
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083048-99528.png)
A.7 | B.8 | C.9 | D.10 |
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083042-17559.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083043-98550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083043-54249.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083043-43221.png)
求证:BD=EC
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083039-40823.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083034-23173.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083034-89790.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083034-73432.png)
小题1:(1)尺规作图:作线段
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083035-68967.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083035-50910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083035-47329.png)
小题2:(2)在已作的图形中,若
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083035-50910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083035-67554.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083036-61070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083036-13307.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083036-93937.png)
求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103083036-76772.png)
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