如图,在平面直角坐标系中,
的三个顶点的坐标分别为
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/44e02f8b-b265-4aca-abfd-b13853a0206f.png?resizew=313)
(1)
与
是位似图形,位似中心是点E,请在图中标出点E的位置,并写出点E的坐标;
(2)以点
为位似中心,将
放大为原来的2倍得到
(其中
与A,
与B,
与C是对应点,并且每对对应点分别在点D的同侧).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238e6513f89285e3aa2bff0010a2b143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a4c690da4f45c9c0ac313a06c071e88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4772c835cbe626040ecc4df30e6f0ccc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/44e02f8b-b265-4aca-abfd-b13853a0206f.png?resizew=313)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f59961a788e8dc69a12f4a4eedffd83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828dc8dc7259c510b6d63abf40f60e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
更新时间:2024-01-25 16:03:10
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图中的小方格都是边长为1的正方形,△ABC的顶点和O点都在正方形的顶点上.
![](https://img.xkw.com/dksih/QBM/2019/5/23/2209828822482944/2216814923177984/STEM/f50c36ab9dfc4448a378591969091a86.png?resizew=217)
(1)以点O为位似中心,在方格图中将△ABC放大为原来的2倍,得到△A′B′C′;
(2)△A′B′C′绕点B′顺时针旋转90°,画出旋转后得到的△A″B′C″,并求边A′B′在旋转过程中扫过的图形面积.
![](https://img.xkw.com/dksih/QBM/2019/5/23/2209828822482944/2216814923177984/STEM/f50c36ab9dfc4448a378591969091a86.png?resizew=217)
(1)以点O为位似中心,在方格图中将△ABC放大为原来的2倍,得到△A′B′C′;
(2)△A′B′C′绕点B′顺时针旋转90°,画出旋转后得到的△A″B′C″,并求边A′B′在旋转过程中扫过的图形面积.
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】平面直角坐标系中,
的顶点坐标分别为
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/5e9698c5-82b4-4606-a4d1-3c00316c4903.png?resizew=324)
(1)画出将
向上平移6个单位后得到的
,并写出点
的坐标.
(2)以点
为位似中心,在网格中画出 与
位似的图形
,且使得
与
的相似比为2:1,并写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26e58c354e0e3043313e9dea8374a1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed19109a90fa98ea44e3a94bc44ca548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a07c5e83420fe354f5b47914c6b52f23.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/5e9698c5-82b4-4606-a4d1-3c00316c4903.png?resizew=324)
(1)画出将
![](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/a18722354086c42e62334983fc50eb6a.png)
(2)以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff2595e01e8751886a27862cce04e2d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828dc8dc7259c510b6d63abf40f60e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828dc8dc7259c510b6d63abf40f60e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
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,△OAB的顶点坐标分别为O(0,0)、A(﹣1,2)、B(﹣2,﹣1),P(m,n)是△OAB的边AB上一点.
![](https://img.xkw.com/dksih/QBM/2020/12/23/2620348833792000/2622654411784192/STEM/5f054b84f9e04eb7bc1f27860dc9b45f.png?resizew=290)
(1)画出将△OAB向右平移2个单位,再向下平移1个单位后的△O1A1B1 ,并写出点P的对应点P1的坐标;
(2)以原点O为位似中心,在y轴的左侧画出△OAB的一个位似△OA2B2 ,使它与△OAB的相似比为2:1,并写出点P的对应点P2的坐标;
(3)判断△O1A1B1与△O2A2B2,能否是关于某一点Q为位似中心的位似图形,若是,请在图中标出位似中心Q,并写出点Q的坐标.
![](https://img.xkw.com/dksih/QBM/2020/12/23/2620348833792000/2622654411784192/STEM/5f054b84f9e04eb7bc1f27860dc9b45f.png?resizew=290)
(1)画出将△OAB向右平移2个单位,再向下平移1个单位后的△O1A1B1 ,并写出点P的对应点P1的坐标;
(2)以原点O为位似中心,在y轴的左侧画出△OAB的一个位似△OA2B2 ,使它与△OAB的相似比为2:1,并写出点P的对应点P2的坐标;
(3)判断△O1A1B1与△O2A2B2,能否是关于某一点Q为位似中心的位似图形,若是,请在图中标出位似中心Q,并写出点Q的坐标.
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图,在平面直角坐标系中,△ABC与△A′B′C′关于点P位似,其中顶点A,B,C依次应A′,B',C′,且都在格点上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/ad71ddbb-090c-469a-a2f9-796625c1970f.png?resizew=251)
(1)在图上画出位似中心P;
(2)根据图形,直接写出点P的坐标,及△ABC与△A′B′C′的面积比.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/ad71ddbb-090c-469a-a2f9-796625c1970f.png?resizew=251)
(1)在图上画出位似中心P;
(2)根据图形,直接写出点P的坐标,及△ABC与△A′B′C′的面积比.
您最近一年使用:0次