题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141546-44564.jpg)
(1)在单位长度为1方格纸中,将△ABC向右平移3个单位得到△A1B1C1,画出△A1B1C1.
(2)求△A1B1C1的面积
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141546-58146.png)
解析
试题分析:(1)根据平移变换的作图方法分别作出△ABC的三个顶点的对应点,再顺次连接即可;
(2)根据三角形的面积公式结合格点的特征求解即可.
(1)如图所示:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141546-58146.png)
(2)△A1B1C1的面积
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141546-94183.png)
点评:作图题是初中数学的重点,在中考中比较常见,一般难度不大,需熟练掌握.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141535-17948.png)
A. B. C. D.
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141529-87554.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141516-30238.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141516-26489.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141516-90401.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141516-85470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141517-35737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141517-35737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141517-70120.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141517-91837.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141517-99694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141517-39730.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141518-83972.png)
(1)三角板绕点
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141517-35737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141518-51658.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141518-87449.png)
(2)三角板绕点
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141517-35737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141518-62747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141518-62747.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141519-77348.png)
(3)如图
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141519-30642.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141516-85470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141519-24628.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141519-82341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141519-45191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141520-99734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141507-30933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141507-30933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141508-65543.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141508-27594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141508-31596.jpg)
(1)作出
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141507-30933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141508-27594.png)
(2)直接写出
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141507-30933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106141458-33793.png)
A.AC=A"C" |
B.AB∥B"C" |
C.AA"⊥MN |
D.BO=B"O |
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