题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144637-55942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144637-45903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144638-39496.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144638-88085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144638-99724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144638-91854.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144639-60416.jpg)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144638-99724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144639-17598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144639-17598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144639-51659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144639-40617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144640-18395.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144638-99724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144640-40917.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144640-64321.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144640-40453.jpg)
在Rt△
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144641-96188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144641-94168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144641-27922.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144642-85830.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144638-99724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144639-17598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144639-17598.png)
过
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144639-51659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144640-40917.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144642-16216.png)
在Rt△
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144642-38874.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144642-92896.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144643-93480.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144643-79059.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144643-82773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144639-51659.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144639-40617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144640-18395.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144633-69760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144633-24843.png)
A.第一象限 | B.第二象限 | C.第三象限 | D.第四象限 |
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144628-79662.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144618-12274.png)
(1)这是一个什么图形;
(2)求出它的面积;
(3)求出它的周长.
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144611-56616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144611-56616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144601-93257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144602-46292.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119144602-99529.png)
A.第一象限 | B.第二象限 | C.第三象限 | D.第四象限 |
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