如图,在平面直角坐标系中,
的顶点坐标分别为A(0,2),B(1,3),C(2,1).
![](https://img.xkw.com/dksih/QBM/2022/4/5/2951428718551040/2952857199656960/STEM/08b78a7d-12f4-4359-aa67-258eab063ea6.png?resizew=207)
(1)请在平面直角坐标系中,以原点O为位似中心,画出
的位似图形
,使它与
的相似比为2:1;
(2)求出
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2022/4/5/2951428718551040/2952857199656960/STEM/08b78a7d-12f4-4359-aa67-258eab063ea6.png?resizew=207)
(1)请在平面直角坐标系中,以原点O为位似中心,画出
![](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)
(2)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
更新时间:2022-04-07 08:26:15
|
相似题推荐
解答题-作图题
|
适中
(0.65)
名校
【推荐1】在如图正方形网格中作图:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/e9e2079e-7eb5-4213-ac96-f569a054e204.png?resizew=413)
(1)在图1中画出
,使
,且
;
(2)在图2中画出
,使
,且
;
(3)在图3中画出
,使
,且
非直角三角形,该
的面积为______.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/e9e2079e-7eb5-4213-ac96-f569a054e204.png?resizew=413)
(1)在图1中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/015193db50f39587c2a68438769d16e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d31f27b32bcb4bc849da302b6468e94c.png)
(2)在图2中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb961bd7db3adb76af2d4cedb611bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86857e2e1e3f1a01dbfc32219dcef685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8c6bcb9a048db48b37333e87db770d5.png)
(3)在图3中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa485cf3776f36aaf4abaadaf30fb85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7db645b2ac92247f7f342dadc635960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa485cf3776f36aaf4abaadaf30fb85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa485cf3776f36aaf4abaadaf30fb85.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图为三个并列的边长相同的正方形,试说明:∠1+∠2+∠3=90°.
![](https://img.xkw.com/dksih/QBM/2020/10/23/2577083710431232/2578515056713728/EXPLANATION/f3cc8ff26c97495d9ea3ab3c2129ac51.png?resizew=240)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】在平面直角坐标系中,△ABC的三个顶点坐标分别为A(2,﹣4)、B(3,﹣2)、C(6,﹣3).
(1)画出△ABC关于x轴对称的△A1B1C1;
(2)以M点为位似中心,在网格中画出△A1B1C1的位似图形△A2B2C2,使△A2B2C2与△A1B1C1的相似比为2:1.
(3)直接写出C2的坐标.
(1)画出△ABC关于x轴对称的△A1B1C1;
(2)以M点为位似中心,在网格中画出△A1B1C1的位似图形△A2B2C2,使△A2B2C2与△A1B1C1的相似比为2:1.
(3)直接写出C2的坐标.
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,在6×8的网格图中,每个小正方形边长均为1,原点O和△ABC的顶点均为格点.
(1)以O为位似中心,在网格图中作△A′B′C′,使△A′B′C′与△ABC位似,且位似比为1:2;(保留作图痕迹,不要求写作法和证明)
(2)若点C的坐标为(2,4),则点A′的坐标为( , ),点C′的坐标为( , ),S△A′B′C′:S△ABC= .
(1)以O为位似中心,在网格图中作△A′B′C′,使△A′B′C′与△ABC位似,且位似比为1:2;(保留作图痕迹,不要求写作法和证明)
(2)若点C的坐标为(2,4),则点A′的坐标为( , ),点C′的坐标为( , ),S△A′B′C′:S△ABC= .
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/da274a11-557e-480b-bd70-2546bdc799ca.png?resizew=205)
您最近一年使用:0次