如图, 已知
、直线l及点
.
关于直线l对称的
;
(2)如果点
与
点关于某点成中心对称,请标出这个对称中心 O,并画出与
关于点 O 成中心对称的
. [不写画法,保留画图痕迹].
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)如果点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828dc8dc7259c510b6d63abf40f60e90.png)
更新时间:2024-01-24 23:00:01
|
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解答题-作图题
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较易
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【推荐1】在
的正方形网格中,已将图中的四个小正方形涂上阴影,若再从其余小正方形中任选一个也涂上阴影,使整个阴影部分组成的图形成轴对称图形,请画出三种情形.
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真题
【推荐2】利用对称性可设计出美丽的图案.在边长为1的方格纸中,有如图所示的四边形(顶点都在格点上).
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(1)先作出该四边形关于直线l成轴对称的图形,再作出你所作的图形连同原四边形绕O点按顺时针方向旋转90°后的图形;
(2)完成上述设计后,整个图案的面积等于_________.
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(1)先作出该四边形关于直线l成轴对称的图形,再作出你所作的图形连同原四边形绕O点按顺时针方向旋转90°后的图形;
(2)完成上述设计后,整个图案的面积等于_________.
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解答题-问答题
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较易
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【推荐1】如图,
的顶点坐标分别为
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(1)请在图中画出
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解答题-作图题
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【推荐2】如图,方格纸中的每个小方格都是边长为1个单位的正方形,在建立平面直角坐标系后,
的顶点均在格点上,点
的坐标为
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/5fcea536-cb34-4e3c-91b8-8d33b52ecd89.png?resizew=211)
(1)试作出
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后的图形
;
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为对称中心,画出
关于原点
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(3)请在
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(1)试作出
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
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(2)以原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828dc8dc7259c510b6d63abf40f60e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
(3)请在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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您最近一年使用:0次
解答题-作图题
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较易
(0.85)
【推荐1】如图,在直角坐标系中,每个小方格都是边长为1的正方形,点A的坐标是
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/3598c242-01e0-49cc-8670-4c98b912e72f.png?resizew=403)
(1)将
先向上平移3个单位长度,再向左平移1个单位长度,在图(1)中画出平移后的图形
;
(2)将
绕点A按逆时针方向旋转
,在图(2)画出旋转后的图形
;
(3)我们发现点B、
关于某点中心对称,对称中心的坐标是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed3636ebd750003453533da1463036b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/3598c242-01e0-49cc-8670-4c98b912e72f.png?resizew=403)
(1)将
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2930578bccee950983d455b3c066435.png)
(3)我们发现点B、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
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解答题-问答题
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【推荐2】图中的两个四边形关于某点对称,找出它们的对称中心.
![](https://img.xkw.com/dksih/QBM/2021/10/2/2820494687649792/2820522413563904/STEM/8efe4323932a449f801c18a8082063d5.png?resizew=210)
您最近一年使用:0次