题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054304-25867.png)
(1)画
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054305-18756.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054305-26174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054305-64093.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054305-40436.png)
答案
(2)画图正确(如图).
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054306-14700.png)
连结
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054306-47313.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054306-80401.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054305-26174.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054305-18756.png)
先根据关于
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054306-73858.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054306-80401.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-36163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-65931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-66318.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-81323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-31657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-36163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-70751.png)
(1)若直线
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-36163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-65931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-31657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-36163.png)
①如图1,若
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-23009.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-44074.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-52733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-89816.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054258-39795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054258-23487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054258-19258.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054258-29574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054258-35011.png)
②如图2,若
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054258-41382.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054258-44741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-65931.png)
(2)如图3,若直线
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-36163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054257-65931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054258-36807.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054258-50255.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054259-51756.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054251-31734.png)
A.2.5 | B.3 | C.4 | D.5 |
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054246-86608.png)
(1)观察: ①如图2、图3,当∠CDF="0°" 或60°时,AM+CK_______MK(填“>”,“<”或“=”).
②如图4,当∠CDF="30°" 时,AM+CK___MK(只填“>”或“<”).
(2)猜想:如图1,当0°<∠CDF<60°时,AM+CK_______MK,证明你所得到的结论.
(3)如果
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054246-91240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054247-83858.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054235-77806.png)
(1)求证:△DHQ∽△ABC;
(2)求y关于x的函数解析式并求y的最大值;
(3)当x为何值时,△HDE为等腰三角形?
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054226-74029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103054226-25287.png)
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