如图,在平面直角坐标系中,已知△ABC的三个顶点坐标分别是A(2,-1) ,B(1,-2) ,C(3,-3)
(2)将△ABC绕点O顺时针旋转90°得到△A2B2C2,请画出△A2B2C2,并求出点C经过的路径长.
(2)将△ABC绕点O顺时针旋转90°得到△A2B2C2,请画出△A2B2C2,并求出点C经过的路径长.
更新时间:2022-04-29 13:27:25
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】我们引入准外心的定义,到三角形的两个顶点距离相等的点,叫做此三角形的准外心,请回答下面的三个问题.
如图1,若
,则点
为
的准外心,此时,点
在线段
的 上.
如图2,已知
为直角三角形,斜边
,准外心
在
边上,试探究
的长.
如图3,点
既是
又是
的准外心,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b173a1a1a36640751c89536e79d779b0.png)
,求
的值.
![](https://img.xkw.com/dksih/QBM/2020/11/17/2594837694480384/2595501881524224/STEM/53aadf8a96cd4c0992122bc9dbaeb7de.png?resizew=137)
![](https://img.xkw.com/dksih/QBM/2020/11/17/2594837694480384/2595501881524224/STEM/d119ebc145a548c4ac5b4cb4e1c11c24.png?resizew=206)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c383691e8d740830a865b12d66f7633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/123b4d128fcbf3b721b45e3a36fcfe38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62295c36d2e2174908c2bec0eb5b30f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39f90188bd10aabf5f6faf7dd4bdf2ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbced129627233661d88e9663a9e13c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b173a1a1a36640751c89536e79d779b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8741cb6ba244787e783a8ff013dbfb5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2020/11/17/2594837694480384/2595501881524224/STEM/53aadf8a96cd4c0992122bc9dbaeb7de.png?resizew=137)
![](https://img.xkw.com/dksih/QBM/2020/11/17/2594837694480384/2595501881524224/STEM/d119ebc145a548c4ac5b4cb4e1c11c24.png?resizew=206)
![](https://img.xkw.com/dksih/QBM/2020/11/17/2594837694480384/2595501881524224/STEM/5f0e9862eec5421ebb83e6cab1f3e0e2.png?resizew=213)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,
是
的直径,点
在直径
上
与
,
不重合),
,且
,连接
,与
交于点
,在
上取一点
,使得
与
相切.
;
(2)若
是
的中点,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4caedfe9d88a5e7b78bc305352a4c394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4a2a127d89d50d3fde881a9b58ef0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa1b5b6051d500fe6c6f1c19c7ee49f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
真题
【推荐1】如图,ABCD是边长为1的正方形,其中
、
、
的圆心依次是点A、B、C.
(1)求点D沿三条圆弧运动到G所经过的路线长;
(2)判断直线GB与DF的位置关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/2012/9/11/1573511694336000/1573511730454528/STEM/c60dba3943ba45679574d7b59d068fa6.png)
![](https://img.xkw.com/dksih/QBM/2012/9/11/1573511694336000/1573511730454528/STEM/2f672efd43cc41428e7918bbdff04e20.png)
![](https://img.xkw.com/dksih/QBM/2012/9/11/1573511694336000/1573511730454528/STEM/3f5efc3993eb498480667c501e4aecb5.png)
(1)求点D沿三条圆弧运动到G所经过的路线长;
(2)判断直线GB与DF的位置关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/2012/9/11/1573511694336000/1573511730454528/STEM/8fb423c21a1449a8ade728b0b0ec7453.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,在平面直角坐标系中,
的顶点
均在正方形 网格的格点上.先将
沿网格线平移,得到
点
的对应点
的坐标是
, 再将
绕原点顺时针旋转
,得到
,点
的对应点为点
.
(1)画出
;
(2)画出
;
(3)在
旋转的过程中,求点
旋转到点
所经过的路径长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca1c693382369dc6c50dcf8bc35125a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c3135fa20c32d04a270750f77c1f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c3135fa20c32d04a270750f77c1f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0468237bbc0d3df77435d98b817c10c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403590d719951bd6133479f4e52041bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/cfeb161b-1151-4dea-b6e7-c2c4c37744b3.png?resizew=161)
(1)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c3135fa20c32d04a270750f77c1f2d.png)
(2)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403590d719951bd6133479f4e52041bc.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c3135fa20c32d04a270750f77c1f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图所示,方格纸中的每个小方格都是边长为1个单位长度的正方形,建立平面直角坐标系,△ABC的顶点均在格点上.(不写作法)
(1)以原点O为对称中心,画出△ABC关于原点O对称的△A1B1C1,并写出B1的坐标;
(2)再把△A1B1C1绕点C1 顺时针旋转90°,得到△A2B2C1,请你画出△A2B2C1,并写出B2的坐标.
(1)以原点O为对称中心,画出△ABC关于原点O对称的△A1B1C1,并写出B1的坐标;
(2)再把△A1B1C1绕点C1 顺时针旋转90°,得到△A2B2C1,请你画出△A2B2C1,并写出B2的坐标.
![](https://img.xkw.com/dksih/QBM/2018/8/8/2006029735313408/2006606607351808/STEM/fc939cad62694016b7daaf255528f491.png?resizew=251)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图,已知△ABC的三个顶点的坐标分别为A(-1,2)、B(-3,0)、C(0,0).
![](https://img.xkw.com/dksih/QBM/2021/3/18/2680419607109632/2682854432481280/STEM/7cd257ff-5802-458d-bc10-0a7e87ab063d.png?resizew=259)
(1)以A为中心将△ABC顺时钟旋转90°得△A1B1C1,请画出△AB1C1,并写现点C1的坐标;
(2)以C为位似中心,在x轴下方作△ABC的位似图形△A2B2C2,使放大前后位似比为1︰2,请画出图形,并求出△A2B2C2的面积;
(3)请直接写出:以A、B、C为顶点的平行四边形的第四个顶点D的坐标.
![](https://img.xkw.com/dksih/QBM/2021/3/18/2680419607109632/2682854432481280/STEM/7cd257ff-5802-458d-bc10-0a7e87ab063d.png?resizew=259)
(1)以A为中心将△ABC顺时钟旋转90°得△A1B1C1,请画出△AB1C1,并写现点C1的坐标;
(2)以C为位似中心,在x轴下方作△ABC的位似图形△A2B2C2,使放大前后位似比为1︰2,请画出图形,并求出△A2B2C2的面积;
(3)请直接写出:以A、B、C为顶点的平行四边形的第四个顶点D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.在平面直角坐标系中,
的顶点坐标分别为
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/426ea351-a372-47c5-9f5f-dc9b9fd06b64.png?resizew=315)
(1)
向左平移3个单位,向上平移1个单位,请画出平移后的
;
(2)以点O为位似中心,在
轴的右侧画出
的一个位似
,使它与
的相似比为
,
(3)若
一边上的点
与
一边上的点H是对应点,则点H的坐标是______;
(4)若
与
是关于某一点Q为位似中心的位似图形,请在图中标出位似中心Q,并写出点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78eba6f91d97cea1dfd73bae53e7b689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685d31faa9b3bc099e4c5a11b80088f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41ecdda0a993e7ff0da722199528ece.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/426ea351-a372-47c5-9f5f-dc9b9fd06b64.png?resizew=315)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd93c18ae02dfb0345608b1cb475664.png)
(2)以点O为位似中心,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d098990cc285dce3b41e9f7d26275b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe103f073845122c66f22dcb14b711f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90688751e58655291204fab149e744e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d098990cc285dce3b41e9f7d26275b.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d098990cc285dce3b41e9f7d26275b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd93c18ae02dfb0345608b1cb475664.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图所示,图中的小方格都是边长为1的正方形,△ABC与△A′B′C′是以点O为位似中心的位似图形,它们的顶点都在小正方形的顶点上.画出位似中心点O,并直接写出△ABC与△A′B′C′的位似比.
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110944508698624/2111456418930688/STEM/a84e55ad5de44373a03e1a4368da0685.png?resizew=174)
您最近一年使用:0次