题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154708-80245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154708-59714.png)
A.6 | B.12 | C.24 | D.60 |
答案
解析
因为直线与x轴、y轴围成的三角形为直角三角形,
所以两个直角边分别为3和4,所以斜边为5,
故周长为3+4+5=12.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154701-73356.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154653-13541.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154654-90052.png)
A.1 | B.-2 | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154647-21226.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154647-65287.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154647-77559.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154647-32747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154647-81568.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154648-51979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154648-51979.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154634-75332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154634-86366.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154634-57038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154634-45933.png)
过点
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154634-14308.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154634-75332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154634-57038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154635-25147.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154635-32382.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154635-48584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154635-27968.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154635-48584.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154635-48584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154635-71715.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154635-48584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022154636-15974.png)
A.-3 | B.2 | C.-3或2 | D.3或-2 |
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