解答题-作图题 适中0.65 引用1 组卷1243
如图,
三个顶点坐标分别为
,
,
.
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/d8c4be7752934da097e0bf1947c25843.png)
(1)请画出
关于
轴对称的
;
(2)以原点
为位似中心,将
放大为原来的2倍,得到
,请在第三象限内画出
,并求出
:
的值.
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/85683119cdb5488598c2321962cd54a6.png)
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/424401ce501a450fbb8b07a6caf006dd.png)
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/28cc12085d07454fa65bcdbd7af1b035.png)
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/52cfed1a27e14b85a753b04effc10e2c.png)
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/d8c4be7752934da097e0bf1947c25843.png)
(1)请画出
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/85683119cdb5488598c2321962cd54a6.png)
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/354cc0baf407484c9e1aa668457def49.png)
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/c8e1f7fcf55a42e089c665d511b0ad71.png)
(2)以原点
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/772cba1348d844a683871a944fd741dc.png)
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/c8e1f7fcf55a42e089c665d511b0ad71.png)
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/5607c23ac8424bf0b5ef112dfa2a5991.png)
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/5607c23ac8424bf0b5ef112dfa2a5991.png)
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/529b5bb1b2a94658b24b5959e2bf6fab.png)
![](https://img.xkw.com/dksih/QBM/2014/2/21/1573707849515008/1573707855896576/STEM/7064c802b9fd489cba7016612a77f32a.png)
14-15九年级上·福建泉州·期末
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