如图,方格纸中每个小方格都是边长为1的正方形,我们把以格点的连线为边的多边形称为“格点多边形”,如图中四边形
就是一个“格点四边形”.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/de0d862a-e448-436a-9b13-ca28e7c385d4.png?resizew=224)
(1)求图中四边形
的面积;
(2)在图中的方格纸中画一个格点四边形,使该四边形与原四边形
关于直线l成轴对称;
(3)P为直线l上一点,连接
,使得
最小,画出点P的位置.
(4)Q为直线l上一点,连接
,使得
最大,画出点Q的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/9/de0d862a-e448-436a-9b13-ca28e7c385d4.png?resizew=224)
(1)求图中四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)在图中的方格纸中画一个格点四边形,使该四边形与原四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)P为直线l上一点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b803a2b0aad69808bf09d4a5267e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a8aaf5f7e6230966913f9fa7fbd091.png)
(4)Q为直线l上一点,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72bf2aa86e54aca8618081f59099447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e1da443e3f68696197dfb43d61eea1.png)
21-22七年级下·河北保定·期末 查看更多[3]
河北省保定市第十七中学教育集团2021-2022学年七年级下学期期末数学试题(已下线)【期末测试】满分预测押题卷(B卷·能力提升练)-【单元测试】2022-2023学年七年级数学下册分层训练AB卷(北师大版)重庆市第六中学2023-2024学年八年级上学期10月月考数学试题
更新时间:2022-08-08 11:20:42
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解答题-作图题
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适中
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【推荐1】如图,小区
与公路
的距离
米,小区
与公路
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米,已知
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(1)请在图中画出点P;
(2)求
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(1)请在图中画出点P;
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解答题-问答题
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【推荐2】如图,C为线段BD上一动点,分别过点B,D作AB⊥BD,ED⊥BD,连接AC,EC.已知AB=5,DE=1,BD=8,设CD=x.
(1)用含x的代数式表示AC+CE的长;
(2)求AC+CE的最小值;
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的最小值.
(1)用含x的代数式表示AC+CE的长;
(2)求AC+CE的最小值;
(3)根据(2)中的规律和结论,请构图并直接写出代数式
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解答题-作图题
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适中
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名校
【推荐1】如图,已知四点A、B、C、D.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/e1a07508-af9e-4723-9457-5e22fc5dc217.png?resizew=99)
(1)请按要求画出图形(不用说明理由).
①连接
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②画直线
;
③连接
并反向延长;
④画点M,使点M既在直线
上也在直线
上;
(2)若平面内有一动点P,线段
,
,
,
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的最小值为_____.(直接写出结果)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/e1a07508-af9e-4723-9457-5e22fc5dc217.png?resizew=99)
(1)请按要求画出图形(不用说明理由).
①连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
②画直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
③连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
④画点M,使点M既在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d42e97eee705d164e6ac6de9ecd6d1f.png)
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解答题-问答题
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【推荐2】已知
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是关于
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的值;
(2)已知等腰
的一边长为7,若
,
恰好是
另外两边的边长,求这个三角形的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
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(1)若
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(2)已知等腰
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解答题-作图题
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【推荐1】如图,请作出△PQR关于y轴对称的△P1Q1R1,写出它们的坐标P1 ( ),Q1( ),R1( )
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【推荐2】如图,点
和
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(1)作
关于
轴对称的
,直接写出点
的对应点
的坐标;
(2)作
关于点
成位似中心的位似
,
与
的相似比为
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同侧,直接写出点
的对应点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c58611cf9017d2cdda3a362a2bf2a43.png)
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(1)作
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(2)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解答题-作图题
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适中
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【推荐1】已知
在平面直角坐标系中的位置如图所示,直线
过点
且平行于
轴.
(1)作出
关于
轴对称的
;
(2)线段
被
轴__________;
(3)如果点
的坐标是
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,点
关于
轴的对称点是
,点
关于直线
的对称点是
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的长为__________.(用含
的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/2df147d3-9741-4355-8696-d4894f6a6733.png?resizew=237)
(1)作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)如果点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe013901c25520004b736da8d54a928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55feb3cbcaf37c63b6ce1c5abece8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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解答题-作图题
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适中
(0.65)
【推荐2】如图,△ABC的∠B=65°,∠C=90°.
![](https://img.xkw.com/dksih/QBM/2016/3/8/1573981863952384/1573981869817856/STEM/5a03b6c6175e43b293e1cb2e852d8627.png)
(1)在图中画出△ABC关于直线MN对称的△DFE,使点A与点D是对称点,点C与点E是对称点;
(2)请直接写出∠D的度数.
![](https://img.xkw.com/dksih/QBM/2016/3/8/1573981863952384/1573981869817856/STEM/5a03b6c6175e43b293e1cb2e852d8627.png)
(1)在图中画出△ABC关于直线MN对称的△DFE,使点A与点D是对称点,点C与点E是对称点;
(2)请直接写出∠D的度数.
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