如图,点
,点
在射线
上匀速运动,运动的过程中以
为对称中心,
为一个顶点作正方形
,当正方形
的面积为40时,点
的坐标是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/6dd1869d-83ec-4422-b731-86350a9eb0a7.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/436a0e9cea21b0174bc40e2af8cc03f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/7/6dd1869d-83ec-4422-b731-86350a9eb0a7.png?resizew=158)
A.![]() | B.![]() | C.![]() | D.![]() |
20-21九年级上·福建福州·开学考试 查看更多[7]
福建省福州市闽侯县2020-2021学年九年级上学期毕业班开学检测数学试题(已下线)专题18.35 正方形与三垂直(巩固篇)(专项练习)-2020-2021学年八年级数学下册基础知识专项讲练(人教版)(已下线)专题6.23 正方形与三垂直(巩固篇)(专项练习)-2020-2021学年八年级数学下册基础知识专项讲练(北师大版)(已下线)专题9.43 正方形中的三垂直模型(培优篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(苏科版)(已下线)专题18.43 正方形的几何模型(三垂直模型)(培优篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(人教版)(已下线)专题19.46 一次函数题型分类专题(面积问题)(培优篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(人教版)(已下线)专题5.18 正方形的几何模型(三垂直模型)(培优篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(浙教版)
更新时间:2020-10-04 23:07:12
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【推荐1】如图,已知正方形
的边长为2,点E是
的中点,连结
,点F在
上,且
,连结
并延长交
于点G.则
的长是( ).
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【推荐2】如图,点
,
,P为x轴上一动点,将线段
绕点P顺时针旋转90°得到
,连接
.则
的最小值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/24/1c160b1d-8cfa-4f1e-a0d9-7312787cc351.png?resizew=217)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edb6ad78c580479530edcab583f207.png)
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【推荐1】四边形
和
都是正方形,E在
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于点H,交
于点I.若要求两正方形的面积之和,则只需知道( )
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【推荐2】如图,在矩形ABCD中,AB=8cm,AD=10cm,点E,F分别是边AB,BC上的动点,点E不与A,B重合,且EF=AB,G是五边形AEFCD内一点,GE=GF且∠EGF=90°.①点E为AB中点时,∠AEG=75°;②点G到AB,BC的距离一定相等;③点G到AB边的距离最大为
;④点G到AB边的距离可能为3.则以上说法正确的是( )
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【推荐1】如图,在等边三角形ABC中,点D、E分别是边AC、BC上两点.将△ABC沿DE翻折,点C正好落在线段AB上的点F处,使得AF:BF=2:3.若BE=16,则点F到BC边的距离是( )
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【推荐2】如图,在正方形
中,
是正方形
内一点,若
则
的最小值是()
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【推荐1】如图,在正方形
中,
,
,
相交于点O,E,F分别为边
,
上的动点(点E,F不与线段
,
的端点重合)且
,连接
,
,
、在点E,F运动的过程中,有下列四个结论:
①
是等腰直角三角形;
②
面积的最小值是1;
③四边形
的面积始终不变;
④存在两个
,使得
的周长是
.
所有正确结论的序号是( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc869125145c0139d92490a41bd3918.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc869125145c0139d92490a41bd3918.png)
③四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e689223dbda856ab0898b0010ffb86a.png)
④存在两个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e5a933a2a0ff3a28009cc989293ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e5a933a2a0ff3a28009cc989293ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab46ea0cba2d06283fae3d864a2329e0.png)
所有正确结论的序号是( )
A.①②③④ | B.①②③ | C.①③④ | D.①③ |
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【推荐2】如图1,是数学家毕达哥拉斯根据勾股定理所画的“勾股树”.如图2,在Rt△ABC中,
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A.![]() | B.![]() | C.![]() | D.![]() |
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