如图,在平面直角坐标系中,△ABC的顶点坐标分别为
,
,
.
(1)△ABC的面积是 ;
(2)画出△ABC关于y轴对称的△A1B1C1,并写出点B1的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eae019053ae564f08c01487f7ff7986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982cf316c2d7fdf49a81b428ab38e9b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9194ae9aab90548e433bf0f4748ceb70.png)
(1)△ABC的面积是 ;
(2)画出△ABC关于y轴对称的△A1B1C1,并写出点B1的坐标.
![](https://img.xkw.com/dksih/QBM/2021/2/7/2652963412484096/2662647897423872/STEM/d2627c1d-4a19-4f17-b6c1-91cf0263d9ef.png)
20-21八年级上·广东佛山·期末 查看更多[5]
广东省佛山市南海区2020-2021学年八年级上学期期末数学试题广东省佛山市第四中学2021-2022学年八年级上学期10月月考数学试题广东省茂名市高州市十校联考2022-2023学年八年级上学期素养展评数学试题(A卷)广东省广州市天河区广州天省实验学校2022-2023学年八年级上学期期末考试数学试题(已下线)期末冲刺测试卷(一)-2022-2023学年八年级数学上册《同步考点解读·专题训练》(北师大版)
更新时间:2021-02-21 07:53:55
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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,在边长为1个单位长度的小正方形组成的网格中,给出了格点
(顶点是网格线的交点).
(1)请画出
关于直线l对称的
;
(2)将
再向下平移5个单位,画出平移后得到的
,并计算
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/12/f7fca496-a000-45a8-b520-0023e0227f4d.png?resizew=200)
(1)请画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)将
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828dc8dc7259c510b6d63abf40f60e90.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图,
中,
点坐标为
,
点坐标为
,
点坐标为
.
(1)在图中画出
关于
轴对称的
(不写画法),并写出点
,
的坐标.
(2)在
轴上找一点
,使得
最小,在坐标系中画出点
,保留作图痕迹,并写出
的坐标 .
(3)连接
,
,则四边形
的面积为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/10/9c7f341d-d0d8-4529-90ae-a25e5b97a853.png?resizew=285)
(1)在图中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
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您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在平面直角坐标系中,
各顶点分别是
,
,
.
(1)在图中作出
关于y轴对称的
;
(2)直接写出对称点坐标
_______,
_______.
(3)在图中第一象限格点找出一点D,并连接
、
,使
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.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32366143230ca122894a4bada7c7b96d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2932df2a491cd8f7441dd60e7a3c9a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d97e0f5484c4853a8481ff4f8547f7a6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/722e339b-26ce-476a-86a0-ed340c08371c.png?resizew=304)
(1)在图中作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)直接写出对称点坐标
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(3)在图中第一象限格点找出一点D,并连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐2】如图,已知平面直角坐标系中的
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/f265d61e-e00b-467d-8c3b-f648350f23cc.png?resizew=239)
(1)画出
关于x轴的对称图形
,
(2)直接写出
的坐标______,
的坐标______.
(3)直接写出
的面积______;
(4)直接写出BC边上的高
______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c80eabaf101288433b3b9e92a4805a3.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/f265d61e-e00b-467d-8c3b-f648350f23cc.png?resizew=239)
(1)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(3)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(4)直接写出BC边上的高
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
您最近一年使用:0次