如图,在平面直角坐标系中,
的三个顶点坐标分别为
、
、
.
(1)画出
,使
与
关于点O成中心对称,并写出点A的对应点
的坐标 ;
(2)以原点O为位似中心,位似比为
,在y轴的左侧,画出将
放大后的
,并写出点A的对应点
的坐标_______;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c179fe7eff7abfdd092b63c9c1b82d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5c320d78ef38e330176c335cc58e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ea77571a7e34f0f5b79e01b4da044f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/25/1200935b-88bf-4d0d-93fc-80baef3d8118.png?resizew=219)
(1)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/a18722354086c42e62334983fc50eb6a.png)
(2)以原点O为位似中心,位似比为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.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)
更新时间:2023-08-23 21:55:01
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,方格纸中每个小正方形的边长均为1个单位长度,
的顶点、点D和线段EF的端点均在小正方形的顶点上.
![](https://img.xkw.com/dksih/QBM/2022/4/14/2958094101676032/2961583583789056/STEM/2ff8dab0-d63e-4737-be13-540e70835d3c.png?resizew=207)
(1)在方格纸中画出
关于点D成中心对称的
(点A的对称点是点M,点B的对称点是点N,点C的对称点是点P),点M、N、P在小正方形的顶点上;
(2)在方格纸中画出以EF为斜边的
,且
,点G在小正方形的顶点上.连接NG,请直接写出线段NG的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2022/4/14/2958094101676032/2961583583789056/STEM/2ff8dab0-d63e-4737-be13-540e70835d3c.png?resizew=207)
(1)在方格纸中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
(2)在方格纸中画出以EF为斜边的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ddb936ffa96e68b1f78657ebc644d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc84e3abc4c506a77de0694dc5283a35.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】正方形网格中(网格中的每个小正方形边长是1),△ABC的顶点均在格点上,请结合所给的直角坐标系解答下列问题:
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899379152166912/2899890549448704/STEM/a6866781-f883-4b72-b426-da5335bdbda8.png?resizew=273)
(1)若△DEF是由△ABC绕着某点旋转得到的,则这点的坐标为 ;
(2)作出△ABC关于原点O成中心对称的
;
(3)直接写出点
的坐标为 .
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899379152166912/2899890549448704/STEM/a6866781-f883-4b72-b426-da5335bdbda8.png?resizew=273)
(1)若△DEF是由△ABC绕着某点旋转得到的,则这点的坐标为 ;
(2)作出△ABC关于原点O成中心对称的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
(3)直接写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】定义:如果二次函数
,(
,
、
、
是常数)与![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35d4f43b84ee11df2f92780abfd4246.png)
,
、
、
是常数)满足
,
,
,则这两个函数互为“旋转函数”.例如:求函数
的“旋转函数”,由函数
可知,
,
,
.根据
,
,
求出
、
、
就能确定这个函数的“旋转函数”.
请思考并解决下面问题:
(1)写出函数
的“旋转函数”;
(2)若函数
与
互为“旋转函数”,求
的值;
(3)已知函数
的图象与x轴交于A、B两点,与y轴交于点C,点A、B、C关于原点的对称点分别是
、
、
,试求证:经过点
、
、
的二次函数与
互为“旋转函数”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047c96a12dfa8588b920c7e109c05efd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc9efeb4455e30293d412938eeea85d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936359df4c926b72b48c6fdae55f12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35d4f43b84ee11df2f92780abfd4246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae7c6c2e0772926b35b2672113557d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76f79be89b8c6227b68eded6b675546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20eec4c0b16de240e078c91716deafd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b115aa9eb665405381be36b7fc0538d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9783bc5a9ae68ecd7de1c27d371106d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4e7da7b1a14af7940a3a9e79ec083f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db4e7da7b1a14af7940a3a9e79ec083f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4995fa0403e013d888c0935ebfe15024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e1ee88beaddafb0d0a185c3a8e0dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20eec4c0b16de240e078c91716deafd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b115aa9eb665405381be36b7fc0538d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9783bc5a9ae68ecd7de1c27d371106d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76f79be89b8c6227b68eded6b675546.png)
请思考并解决下面问题:
(1)写出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/620fff76456e4080c41c51661171c66f.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ae405167ddca6203639916428a0b3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be9b11b6f8788b92cd303cdb4573b45f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9ba0e2c66e7dc8f73014b6edad0f2a6.png)
(3)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99896acded55286e9b1676c671963630.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99896acded55286e9b1676c671963630.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1,是由小正方形构成的9×7网格,每个小正方形的顶点叫作格点,A,B,C三个格点都在圆上.仅用无刻度的直尺在给定的网格中完成作图(保留作图痕迹).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/57a823ea-5053-4c03-af67-73b9d42c1f84.png?resizew=208)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/9766bb12-1712-401d-9cb1-7e33a3db9a24.png?resizew=198)
(1)作出该圆的圆心O;
(2)作出格点E,使直线EA与
相切;
(3)如图2,以点A为坐标原点建立平面直角坐标系,请判断点
、点
关于点A的对称点
,
与
的位置关系,并简要说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/57a823ea-5053-4c03-af67-73b9d42c1f84.png?resizew=208)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/9766bb12-1712-401d-9cb1-7e33a3db9a24.png?resizew=198)
(1)作出该圆的圆心O;
(2)作出格点E,使直线EA与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)如图2,以点A为坐标原点建立平面直角坐标系,请判断点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e8da3e18d6d9d3ccd5974f2c187e44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433e4967048f190923d98187028b1a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a42da28be159399514cc6179a96e34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,
在平面直角坐标系中,点
、
、
.解答问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/18/69738dfd-0b28-477a-bffd-2de739218d90.png?resizew=218)
(1)请按要求对
作如下变换:
①将
绕点
逆时针旋转
得到△
.
②以点
为位似中心,位似比为
,将
在位似中心的异侧进行放大得到△
;并写出点
,
的坐标: , .
(2)在
内,点
的坐标为
,在△
中与之对应的点为
,在△
中与之对应的点为
.则
.(用含
,
的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ceec39aaaccbeaac9a4a5bdbb0f0e9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fcf82d01c39fd2c96e1edba0ad37dd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37df9dad3961893b22d6639c4311e267.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/18/69738dfd-0b28-477a-bffd-2de739218d90.png?resizew=218)
(1)请按要求对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
①将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
②以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe103f073845122c66f22dcb14b711f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24dc97d6060d7bdcd077a4803545ec77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30277e0be448b4955903e81e8795e45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24dc97d6060d7bdcd077a4803545ec77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b66ed3b516a0d2d2a3082be88f088a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】在平面直角坐标系中,△ABC的位置如图所示,每个小正方形的边长为1,以原点O为位似中心,在第一象限内,对△ABC进行位似变换,得到△DEF(点A,B,C分别对应点D,E,F),且△ABC与△DEF的相似比为2:1
(1)画出△DEF;
(2)线段AC上一点(x,y)经过变换后对应的点的坐标为________;
(3)求△DEF的周长.
(1)画出△DEF;
(2)线段AC上一点(x,y)经过变换后对应的点的坐标为________;
(3)求△DEF的周长.
![](https://img.xkw.com/dksih/QBM/2021/11/19/2854742407102464/2855203807150080/STEM/0108165ba91d4aa9824200427aa4be14.png?resizew=196)
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三个顶点坐标分别是
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/5/16/2980537743843328/2982138155941888/STEM/f2e31fbc292148bcb2d6774ee0155b45.png?resizew=554)
(1)画出△ABC关于y轴对称的
;
(2)画出△ABC以点O为位似中心,位似比为1:2的
,并写出
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad8adc681552b6de39f05318786ebcef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df1c87444a1707ef33351368e483749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/399d5d9c51001c1a48ba821fd51b8a3a.png)
![](https://img.xkw.com/dksih/QBM/2022/5/16/2980537743843328/2982138155941888/STEM/f2e31fbc292148bcb2d6774ee0155b45.png?resizew=554)
(1)画出△ABC关于y轴对称的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)画出△ABC以点O为位似中心,位似比为1:2的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828dc8dc7259c510b6d63abf40f60e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
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,在平面直角坐标系中,每个小正方形的边长都是1个单位长度,
的顶点都在格点上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/26/4a7d8021-a5b0-4bfa-a095-357c655bbb21.png?resizew=275)
(1)以原点O为位似中心,在第三象限内画出将
放大为原来的2倍后的位似图形
;
(2)已知
的面积为
,则
的面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/26/4a7d8021-a5b0-4bfa-a095-357c655bbb21.png?resizew=275)
(1)以原点O为位似中心,在第三象限内画出将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec85f29c0860b57a8f0cf8098c13a97e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
您最近一年使用:0次