如图,
正方形网格中,
的顶点坐标分别为
,
,
;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/cebb20bb-96df-4e39-8d30-9184846bfd8f.png?resizew=263)
(1)以T为位似中心,按
在位似中心两侧将三角形
放大为
,画出三角形来,并写出在第三象限内对应点
和
的坐标;
(2)在(1)中,若
为线段
上任一点,写出变换后C的对应点
坐标(用含a,b的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23f3b42cd6069f0e461035e76459ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a04e30d5827f2120d997997e4e31ba17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/722da773807eb78204a664eedc557594.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/000c5734cbc399e18f1527145ab4cd29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6042775665b8355c32623841b6b1146b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/cebb20bb-96df-4e39-8d30-9184846bfd8f.png?resizew=263)
(1)以T为位似中心,按
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b98ac3084caebc6d9bff492e8fce6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0207ea08fccf73a5559262dd249d786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9a3b3d4f0cfe6febd048d7bdabc621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
(2)在(1)中,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca7fe59ad2afaf06dfe60a421888e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
更新时间:2024-01-02 19:01:26
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在边长为1的正方形网格中,有一格点△ABC,已知A、B、C三点的坐标分别是A(1,0)B(2,-1)C(3,1).
![](https://img.xkw.com/dksih/QBM/2016/1/18/1573955952033792/1573955958169600/STEM/1d3da95f0ec1412f80e1784b4d5804f0.png?resizew=203)
![](https://img.xkw.com/dksih/QBM/2016/1/18/1573955952033792/1573955958169600/STEM/df55c4abece64722895106bf24a43cf9.png?resizew=3)
(1)请在网格图形中画出平面直角坐标系;
(2)以原点O为位似中心,将△ABC放大2倍,画出放大后的△A′B′C′;
(3)写出△A′B′C′各顶点的坐标:A′____,B′____,C′ ___;
![](https://img.xkw.com/dksih/QBM/2016/1/18/1573955952033792/1573955958169600/STEM/1d3da95f0ec1412f80e1784b4d5804f0.png?resizew=203)
![](https://img.xkw.com/dksih/QBM/2016/1/18/1573955952033792/1573955958169600/STEM/df55c4abece64722895106bf24a43cf9.png?resizew=3)
(1)请在网格图形中画出平面直角坐标系;
(2)以原点O为位似中心,将△ABC放大2倍,画出放大后的△A′B′C′;
(3)写出△A′B′C′各顶点的坐标:A′____,B′____,C′ ___;
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】在如图所示的方格中,△OAB的顶点坐标分别为O(0,0)、A(﹣2,﹣1)、B(﹣1,﹣3),△O1A1B1与△OAB是关于点P为位似中心的位似图形.
![](https://img.xkw.com/dksih/QBM/2021/12/28/2882464233439232/2924211970433024/STEM/f890d2990923425d998c9ceac6ffb708.png?resizew=257)
(1)在图中标出位似中心P的位置,并写出点P的坐标及△O1A1B1与△OAB的位似比;
(2)以原点O为位似中心,在y轴的左侧画出△OAB的另一个位似△OA2B2,使它与△OAB的位似比为2:1,并写出点B的对应点B2的坐标.
![](https://img.xkw.com/dksih/QBM/2021/12/28/2882464233439232/2924211970433024/STEM/f890d2990923425d998c9ceac6ffb708.png?resizew=257)
(1)在图中标出位似中心P的位置,并写出点P的坐标及△O1A1B1与△OAB的位似比;
(2)以原点O为位似中心,在y轴的左侧画出△OAB的另一个位似△OA2B2,使它与△OAB的位似比为2:1,并写出点B的对应点B2的坐标.
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图,平面直角坐标系中,
的顶点分别为
,
和
,
与
是以点
为位似中心的位似图形,点
,
,
都在格点上.
(1)在图中确定出位似中心
的位置,并写出点
及点
的对应点
的坐标;
(2)以原点
为位似中心,在位似中心的同侧画出与
位似的
,使它与
的相似比为
,并写出点
的对应点
的坐标;
(3)
内部一点
的坐标为
,写出
在
中的对应点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b62194097ac66a5093c57fca2f5b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92bbf91fa80292158e5a7ad9f9aa21fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27209d52439a508898b9679329731f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09a64441d3cf530b0e4d8ed41e6e41a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
(1)在图中确定出位似中心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
(2)以原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef3e5e30a5d97b80edfa260b43c3e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe103f073845122c66f22dcb14b711f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef3e5e30a5d97b80edfa260b43c3e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df1d9b712b639c8b6809c9f3ae03706.png)
![](https://img.xkw.com/dksih/QBM/2021/7/7/2758998760259584/2823411595173888/STEM/f93e7449-d521-474f-8bd8-1654bdb6044c.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】如图,由单位长度为1的小正方形组成的网格图中有
,建立平面直角坐标系后,点O的坐标是
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/3cefe985-29cd-446f-b3cc-552854a1d728.png?resizew=265)
(1)以O为位似中心,作
,相似比为
,且
在第三象限;
(2)点
的坐标为___________.
(3)若线段
上有一点D它的坐标为
,那么它的对应点
的坐标为___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217d853c910c8037d3b6bb0a43017cfc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/3cefe985-29cd-446f-b3cc-552854a1d728.png?resizew=265)
(1)以O为位似中心,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4a98298fde7683538e1998d7d0ef750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061989be1f8110209a399bfc3a3b49b6.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
(3)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
您最近一年使用:0次