如图,在平面直角坐标系
中,
三个顶点坐标分别为
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/11/d0634e09-d959-4e60-b791-4d7acfdc3d9f.png?resizew=471)
(1)请画出
关于x轴对称的
.
(2)以原点O为位似中心,在第一象限画出
的位似图形
,相似比为1:2,求
与
的面积比为______(不写解答过程,直接写出结果)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6c8170dd3ad55d366c866dfa21c7df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f89b18f69812fb34fd1290e2f1b36aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac09e4d97f0b741da92eea4867278af.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/11/d0634e09-d959-4e60-b791-4d7acfdc3d9f.png?resizew=471)
(1)请画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
(2)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/828dc8dc7259c510b6d63abf40f60e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828dc8dc7259c510b6d63abf40f60e90.png)
更新时间:2022-05-06 15:53:03
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解答题-作图题
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【推荐1】△ABC在平面直角坐标系中的位置如图所示.A、B、C三点在格点上.作出△ABC关于y对称的△A1B1C1,并写出点△A1B1C1的坐标.
![](https://img.xkw.com/dksih/QBM/2016/1/20/1573957456805888/1573957462212608/STEM/ccdb529f-6a00-49a0-89ff-88a60b0c0ec0.png)
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解答题-作图题
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【推荐2】画图题(按要求画出图形,图①和②都是边长为1个单位的正方形组成)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/e36707fb-a168-473a-bc90-02e313e85c62.png?resizew=313)
(1)在图①涂黑一个小正方形和原阴影图形构成中心对称图形.
(2)在图②画出关于直线
对称的
再绕点
逆时针旋转90°的
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/e36707fb-a168-473a-bc90-02e313e85c62.png?resizew=313)
(1)在图①涂黑一个小正方形和原阴影图形构成中心对称图形.
(2)在图②画出关于直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c510b85dfbca0e3ab0744655d77e8c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dae1db2db56538d2942d5f6c65c21a5.png)
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解答题-证明题
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【推荐1】已知:如图,在
中,
是
上一点,
是
上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/64de36c9-3d73-4073-8256-58e77507737b.png?resizew=104)
(1)求证:
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9183ec7a1b04e16995eabcf7e8f60187.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/15/64de36c9-3d73-4073-8256-58e77507737b.png?resizew=104)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e10e920866721a989bfea0f1c3e704d0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fafc25a403c0623128c30f447c5b99da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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解答题-计算题
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【推荐2】如图,晚上小明由路灯
走向路灯
,当他行至点P处时,发现他在路灯BC下的影长为
,且影子的顶端恰好在A点,接着他又走了
至点Q处,此时他在路灯AD下的影子的顶端恰好在B点,已知小明的身高为
,路灯BC的高度为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/0a1f5beb-70ad-4237-aa39-c1baf1aa99ab.png?resizew=127)
(1)计算小明站在点Q处时在路灯AD下影子的长度;
(2)计算路灯AD的高度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad491e5b5e14c49ef8b7004ebcfcef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801662570192131235fd12b432f1f646.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/660fccf71b88d44bab5465c113119155.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/568ff53fc8fbdea03629899c052598b7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/0a1f5beb-70ad-4237-aa39-c1baf1aa99ab.png?resizew=127)
(1)计算小明站在点Q处时在路灯AD下影子的长度;
(2)计算路灯AD的高度.
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解答题-作图题
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【推荐1】如图,在平面直角坐标系中,
的顶点坐标分别为
,
,
,以原点O为位似中心画一个
,使它与
位似,且相似比是
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/a30bf9cf-9fc3-4722-be4c-733dc567a0d0.png?resizew=238)
(1)请画出
;
(2)请直接写出
各顶点的坐标;
(3)若
内部一点M的坐标为
,则点M的对应点
的坐标是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bdfc750fe0ace842a461e89f2b7b290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee07d86765c4fb74ac647742f16bd57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa3ed5e452abfb4593c3609c98f7c8ae.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/37d65e051e943ab28fa57aee2fb57994.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/a30bf9cf-9fc3-4722-be4c-733dc567a0d0.png?resizew=238)
(1)请画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
(2)请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
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解答题-作图题
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名校
【推荐2】如图,在平面直角坐标系中,
的顶点坐标分别为
、
、
.
(1)以原点O为位似中心,在y轴的右侧画出
的一个位似
,使它与
的相似比为2:1,并分别写出点A、B的对应点
、
的坐标.
(2)画出将
向左平移2个单位,再向上平移1个单位后的
,并写出点A、B的对应点
、
的坐标.
(3)判断
与
,能否是关于某一点M为位似中心的位似图形?若是,请在图中标出位似中心M,并写出点M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/c179fe7eff7abfdd092b63c9c1b82d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5c320d78ef38e330176c335cc58e8.png)
(1)以原点O为位似中心,在y轴的右侧画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb99c20237aca8ff2ba640c28fbc5b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
(2)画出将
![](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/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
(3)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb99c20237aca8ff2ba640c28fbc5b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef3e5e30a5d97b80edfa260b43c3e02.png)
![](https://img.xkw.com/dksih/QBM/2021/12/2/2863618722283520/2865783462961152/STEM/c34aae11-131c-4fd2-8809-605a5b801307.png?resizew=302)
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