题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152901-90124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152901-66240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152901-98274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152901-97553.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152901-90124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152901-66240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152901-90124.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:设P(a,b),Q(m,n);
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152901-90124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152901-66240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152901-98274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152901-97553.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152901-90124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152901-66240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152903-15321.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152903-62981.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152903-69356.png)
点评:本题考查点在直线上和点与点关于原点对称,掌握两点关于原点对称它们的坐标关系是解本题的关键
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152857-73409.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152857-95056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152858-20451.png)
A.(0,-2) | B.(0,-4) | C.(2,0) | D.(4,0) |
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152848-81241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152848-68650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152849-70191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152849-71226.png)
A.(5,7) | B.(2,10) | C.(2,10)或(2,4) | D.(5,7)或(-1,7) |
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152838-78512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152838-97394.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152834-49324.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152834-49026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152834-49026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152834-31326.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152834-31326.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152834-49324.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152823-17822.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152824-84616.png)
在坐标系中作出点A、B、C、D。
顺次连接ABCDA,求四边形ABCD的面积。
![](http://img.shitiku.com.cn/uploads/allimg/20191119/20191119152824-94890.png)
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