如图,在平面直角坐标系中,点P(3,4),连接OP,将线段OP绕点O逆时针旋转90°得线段OP1.
(1)在图中作出线段OP1,并写出P1点的坐标;
(2)求点P在旋转过程中所绕过的路径长;
(3)求线段OP在旋转过程中所扫过的图形的面积.
(1)在图中作出线段OP1,并写出P1点的坐标;
(2)求点P在旋转过程中所绕过的路径长;
(3)求线段OP在旋转过程中所扫过的图形的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/25/8dc8ee7b-1d1a-4b8d-8305-7ffbc1033f1d.png?resizew=261)
更新时间:2020-03-21 19:41:31
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解答题-问答题
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【推荐1】△ABC在平面直角坐标系xOy中的位置如图所示:
(1)若△A1B1C1与△ABC关于原点O成中心对称,则点B1的坐标为 ;
(2)将△ABC向右平移4个单位长度得到△A2B2C2,则点A2的坐标为 ;
(3)将△ABC绕O点顺时针方向旋转90°,则点B走过的路径长为 ;
(4)在x轴上找一点P,使PB+PC的值最小,则点P的坐标为 .
(1)若△A1B1C1与△ABC关于原点O成中心对称,则点B1的坐标为 ;
(2)将△ABC向右平移4个单位长度得到△A2B2C2,则点A2的坐标为 ;
(3)将△ABC绕O点顺时针方向旋转90°,则点B走过的路径长为 ;
(4)在x轴上找一点P,使PB+PC的值最小,则点P的坐标为 .
![](https://img.xkw.com/dksih/QBM/2019/11/23/2339943689576448/2340964739579905/STEM/31e69f6edce740a59f5d049fb0b13b1d.png?resizew=307)
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解答题-作图题
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【推荐2】如图,在由边长为
个单位长度的小正方形组成的网格中,
的顶点均为格点(网格线的交点),坐标分别为
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/4b4829d8-0dad-4bac-8515-3f9f99d202f7.png?resizew=318)
(1)将
沿
轴向左平移
个单位长度,画出平移后的
;
(2)将
绕点
按顺时针方向旋转
,画出旋转后的
;
(3)在(2)的条件下,求点
绕点
旋转到点
所经过的路径长(结果保留
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241ce9bd28046ce9b90f43b391132884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b62194097ac66a5093c57fca2f5b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14168792b74b97b8bc51531604ba36b4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/27/4b4829d8-0dad-4bac-8515-3f9f99d202f7.png?resizew=318)
(1)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd93c18ae02dfb0345608b1cb475664.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d098990cc285dce3b41e9f7d26275b.png)
(3)在(2)的条件下,求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2d1ecae9c649cc3c89f9ce0c063208.png)
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解答题-问答题
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【推荐1】在平面直角坐标系中,已知
,
,
;
(1)将
沿
轴负方向平移
个单位至
,画图并写出
的坐标____________;
(2)以
点为旋转中心,将
逆时针方向旋转
得
,画图并写出
的坐标_____;
(3)在平移和旋转过程中线段
扫过的面积为___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49a31f8e8dba418bd5d886998ef8d17.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/11/6436d665-2b86-4ae1-8d00-91125554dddb.png?resizew=220)
(1)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
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(3)在平移和旋转过程中线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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解答题-作图题
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【推荐2】在如图的正方形网格中,每个小正方形的边长都是单位1,三角形ABC的顶点均在格点上.
![](https://img.xkw.com/dksih/QBM/2019/7/30/2257900146761728/2258980545855488/STEM/6e9ae248b43e477f8eb2821b865614e0.png?resizew=212)
(1)画出三角形ABC绕A点按逆时针方向旋转90°后得到的三角形AB1C1;
(2)画出三角形A2B2C2,使三角形A2B2C2和三角形AB1C1关于直线a成轴对称;
(3)线段AB变换到AB1的过程中扫过的区域面积为 .
![](https://img.xkw.com/dksih/QBM/2019/7/30/2257900146761728/2258980545855488/STEM/6e9ae248b43e477f8eb2821b865614e0.png?resizew=212)
(1)画出三角形ABC绕A点按逆时针方向旋转90°后得到的三角形AB1C1;
(2)画出三角形A2B2C2,使三角形A2B2C2和三角形AB1C1关于直线a成轴对称;
(3)线段AB变换到AB1的过程中扫过的区域面积为 .
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解答题-作图题
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【推荐1】如图,已知△ABC的三个顶点的坐标分别为A(-2,3)、B(-6,0)、C(-1,0).
(1)经过平移,可使△ABC 的顶点A与坐标原点O重合,直接写出此时点C 的对应点C1坐标;(不必画出平移后的三角形)
(2)将△ABC绕坐标原点O逆时针旋转90°,得到△A′B′C′,画出△A′B′C′,并写出点A 的对应点A′的坐标.
(1)经过平移,可使△ABC 的顶点A与坐标原点O重合,直接写出此时点C 的对应点C1坐标;(不必画出平移后的三角形)
(2)将△ABC绕坐标原点O逆时针旋转90°,得到△A′B′C′,画出△A′B′C′,并写出点A 的对应点A′的坐标.
![](https://img.xkw.com/dksih/QBM/2018/11/16/2076794204889088/2084588890710016/STEM/c07fa848b0ac409a9e47ae6e1ad6a8ac.png?resizew=229)
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解答题-作图题
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【推荐2】作图:如图,边长为1的小正方形组成的方格纸上,将△ABC绕着点A顺时针旋转
.画出旋转后的
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/e9b04d91-181c-4213-9daf-f72dac7e3987.png?resizew=151)
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