如图,在平面直角坐标系中,每个小正方形的边长均为1,
的顶点均在网格格点上,且
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/2aa8f4a9-3a40-4f87-b4a9-45ef03d5d1cb.png?resizew=245)
(1)以原点O为位似中心,在第一象限画出
,使得
与
位似,且
与
的相似比
,点A、B、C的对应点分别为点
、
、
;
(2)点
的坐标为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98a76954886afb825382f5fdece6fcdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78b8c8353ed5d9144e451c56afa9607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16abee114cc66b4fa2916334b3f6529f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/2aa8f4a9-3a40-4f87-b4a9-45ef03d5d1cb.png?resizew=245)
(1)以原点O为位似中心,在第一象限画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300e9d7a7b6e107ae8678ae6c9b52f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0758f3ff9f1f7109024c1ef65536c58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211b9e53e4677ae9e2b20d5f7ce0a4e4.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211b9e53e4677ae9e2b20d5f7ce0a4e4.png)
更新时间:2023-03-30 22:52:52
|
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】如图,在边长均为l的小正方形网格纸中,△ABC的顶点A、B、C均在格点上,O为直角坐标系的原点,点A(﹣1,0)在x轴上.
(1)以O为位似中心,将△ABC放大,使得放大后的△A1B1C1与△ABC的相似比为2:1,要求所画△A1B1C1与△ABC在原点两侧;
(2)分别写出B1、C1的坐标.
(1)以O为位似中心,将△ABC放大,使得放大后的△A1B1C1与△ABC的相似比为2:1,要求所画△A1B1C1与△ABC在原点两侧;
(2)分别写出B1、C1的坐标.
![](https://img.xkw.com/dksih/QBM/2020/1/9/2373312875520000/2373409119395840/STEM/349e4936b060492daad966d07ed17fe2.png?resizew=234)
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解答题-问答题
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较易
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【推荐2】如图,在由边长为1的小正方形组成的网格图中有
ABC,建立平面直角坐标系后,点O的坐标是(0,0).
(1)以O为位似中心,作
,相似比为1:2,且保证
在第三象限;
(2)点
的坐标为( );
(3)
的面积是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(1)以O为位似中心,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10f930ef64cd1cbce44b5395ed7f714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884e4bec1a5258d57d8084893d6989bb.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5d54dfb9237412a7c1c00658830de6.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884e4bec1a5258d57d8084893d6989bb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/27d4f773-1b7e-4588-931f-477cad78dc25.png?resizew=304)
您最近一年使用:0次
解答题-作图题
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较易
(0.85)
【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.
(1)以图中的点O为位似中心,在网格中画出△ABC的位似图形△A1B1C1,使△A1B1C1与△ABC的位似比为2:1;
(2)若△A1B1C1的面积为S,则△ABC的面积是______.
(1)以图中的点O为位似中心,在网格中画出△ABC的位似图形△A1B1C1,使△A1B1C1与△ABC的位似比为2:1;
(2)若△A1B1C1的面积为S,则△ABC的面积是______.
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421531183808512/2421745818542080/STEM/e53cc6f6936143bda120023a7e848641.png?resizew=222)
您最近一年使用:0次
解答题-作图题
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较易
(0.85)
【推荐2】如图,在平面直角坐标系中,
各顶点坐标分别为
,
,
.
(1)以点O为位似中心,在x轴的上方画出
,使
与
位似,且相似比为2,其中点A,B,C的对应点分别为
,
,
;
(2)
的面积为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a6d861cf80bd971be02918cfa58cb76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51cbc3789c024db2cf78d2500acad117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9446ea29ddb6650a5a0cf7ac6f17d80.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/b667b1d1-257a-4399-b99a-ef48b0e4e0c5.png?resizew=265)
(1)以点O为位似中心,在x轴的上方画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
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