操作题:如图所示的正方形网格中,
的顶点均在格点上,请在所给直角坐标系中按要求画图和解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/eaead73b-49d2-411c-bcd8-5d7e8b178d63.png?resizew=203)
(1)作出
关于坐标原点O成中心对称的
;
(2)若将
绕某点逆时针旋转
后,其对应点分别为
、
,
,则旋转中心坐标为 .
(3)D在格点上,以A,B,C,D为顶点作平行四边形,则点D的坐标是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/eaead73b-49d2-411c-bcd8-5d7e8b178d63.png?resizew=203)
(1)作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)若将
![](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/18e7fdc53e734590decc43bcbf9e3a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3471635510e2e2c5aeb8a11efda9f1f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b71c456ed5d0722bb2e693d4d3dfd82.png)
(3)D在格点上,以A,B,C,D为顶点作平行四边形,则点D的坐标是 .
更新时间:2023-03-23 12:46:02
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解答题-作图题
|
适中
(0.65)
【推荐1】如图,在平面直角坐标系中,点A(﹣1,3),B(﹣4,1),C(﹣2,1),先将
ABC沿一确定方向平移得到
A1B1C1(点A的对应点为点A1,点B的对应点为点B1,点C的对应点为点C1),点A1的坐标是(0,2),再将
A1B1C1绕原点O顺时针旋转90°得到
A2B2C2(点A1的对应点为点A2,点B1的对应点为点B2,点C1的对应点为点C2).
(1)先画出
A1B1C1;
(2)再画出
A2B2C2;
(3)若点D为平面内一点,请直接写出以A2,B2、C2为顶点的平行四边形的第四个顶点D的坐标为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(1)先画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(2)再画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(3)若点D为平面内一点,请直接写出以A2,B2、C2为顶点的平行四边形的第四个顶点D的坐标为 .
![](https://img.xkw.com/dksih/QBM/2021/7/12/2762714756947968/2815590808944640/STEM/1d10175d-4313-4d08-a2f8-f30af5b073e8.png)
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解答题-计算题
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适中
(0.65)
【推荐2】综合与实践
问题情境:在综合与实践课上,老师让同学们以“平面直角坐标系中,已知平行四边形三个顶点的坐标,确定第四个顶点坐标,并计算相关图形面积的问题”为主题开展数学活动. 如图,在平面直角坐标系中,已知
ABO三个顶点的坐标分别为A(3,4),B(4,1),O为坐标原点.
ABO的面积;
操作探究:(2)若以A,B,O,C为顶点的四边形是平行四边形,请你在图中画出所有符合条件的平行四边形,并直接写出其顶点C的坐标.
问题情境:在综合与实践课上,老师让同学们以“平面直角坐标系中,已知平行四边形三个顶点的坐标,确定第四个顶点坐标,并计算相关图形面积的问题”为主题开展数学活动. 如图,在平面直角坐标系中,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
操作探究:(2)若以A,B,O,C为顶点的四边形是平行四边形,请你在图中画出所有符合条件的平行四边形,并直接写出其顶点C的坐标.
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解答题-作图题
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适中
(0.65)
【推荐1】如图,在平面直角坐标系内有一个△ABC.
(1)在平面直角坐标系内画出△ABC向下平移4个单位得到的△A1B1C1;
(2)在平面直角坐标系内画出△ABC关于原点O中心对称得到的△A2B2C2.(不要求尺规作图,但要标示出三角形各顶点字母)
(1)在平面直角坐标系内画出△ABC向下平移4个单位得到的△A1B1C1;
(2)在平面直角坐标系内画出△ABC关于原点O中心对称得到的△A2B2C2.(不要求尺规作图,但要标示出三角形各顶点字母)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/26/11dbd1d1-942e-4ee9-bc77-8c416997bc92.png?resizew=271)
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解答题-作图题
|
适中
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【推荐2】如图,在每个小正方形的边长都为1个单位的网格中,
的顶点均在格点(网格线的交点)上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/4cf07142-48c3-45bc-ab2a-224794969f07.png?resizew=306)
(1)将
向右平移4个单位得到
,画出
;
(2)将(1)中的
绕点
逆时针旋转
,得到
,画出
;
(3)求出
在(1)(2)过程中所扫过的面积.(结果保留π)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/6/4cf07142-48c3-45bc-ab2a-224794969f07.png?resizew=306)
(1)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)将(1)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08067cdc969670ee42bfc88e9d0d5257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08067cdc969670ee42bfc88e9d0d5257.png)
(3)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-证明题
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【推荐1】如图,直线
,一副直角三角板
ABC,ΔDEF中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/3/4a7bbafa-b5dc-4457-8e96-3424e6669686.png?resizew=520)
(1)若
DEF如图1摆放,当ED平分∠PEF时,证明:FD平分∠EFM
(2)若
ABC,
DEF如图2摆放时,则∠PDE= .
(3)若图2中
ABC固定,将
沿着AC方向平移,边DF与直线PQ相交于点G,作∠FGQ和∠GFA的角平分线GH、FH相交于点H(如图3),则∠GHF= .
(4)若图2中ΔDEF固定,(如图4)将
ABC绕点A顺时针旋转,旋转至AC与直线AN首次重合的过程中,当线段BC与
DEF的一条边平行时,请直接写出旋转的角度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7928198bde37727e3a04a7f3e6b306fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91f064bb73019053992fe781a53356a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5101ab05fce5c1190dc22f7e7887aaa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e6219ce9770e9e048bfe015fb53346.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/3/4a7bbafa-b5dc-4457-8e96-3424e6669686.png?resizew=520)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(3)若图2中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
(4)若图2中ΔDEF固定,(如图4)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
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解答题-问答题
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适中
(0.65)
【推荐2】如图,P为正方形
内一点,
,
将绕点C逆时针旋转得到
,
(2)求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5064f5ce5ac8428e277fd578da84ec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96645a3530e72d5d733d2c72147d340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0c32d9f3badb7e51233dd39a39fbb3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
的方格纸中,
的顶点均在格点上,请按要求画图.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/a7ff57b0-ac8e-409f-8076-4eefa24a06d4.png?resizew=157)
(1)在图中作一个以点A,B,C,D为顶点的格点四边形,且该四边形为中心对称图形.
(2)在图中找一个格点E,连结
,使
将
的面积分为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd4be97adde17423d59d86d18318c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/a7ff57b0-ac8e-409f-8076-4eefa24a06d4.png?resizew=157)
(1)在图中作一个以点A,B,C,D为顶点的格点四边形,且该四边形为中心对称图形.
(2)在图中找一个格点E,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4806fb7f95f63e863c287faa51f8e3.png)
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解答题-作图题
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适中
(0.65)
【推荐2】如图,正方形网格中(每个小正方形边长是1,小正方形的顶点叫做格点),
的顶点均在格点上,请在所给的平面直角坐标系中解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/09eab26f-4e34-4ab5-8ec5-d52af62fd7ef.png?resizew=235)
(1)作出
关于原点
成中心对称的
;
(2)作出
绕点
顺时针旋转
后的
;
(3)求在(2)中的旋转过程中,点
经过的路径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/09eab26f-4e34-4ab5-8ec5-d52af62fd7ef.png?resizew=235)
(1)作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a0387fc1258f31e44a10068c0ccfd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ebf04bf1911cfd8566b4350fd6d41e.png)
(3)求在(2)中的旋转过程中,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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