如图①,E为矩形
的边
上一点,点P从点B出发沿折线
运动到点D停止,点Q从点B出发沿
运动到点C停止,它们的运动速度都是
,现P,Q两点同时出发,设运动时间为
的面积为
与x的对应关系图象如图②所示,则矩形
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af7df8f3f60223047e28ab6365bf61ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f602d741560793db736be190cae1437a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/120600888d228597fef1a49028064c70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29822da4360900744b59ba551d78f72d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-02-15 18:24:56
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【推荐1】如图(1),点
从平行四边形
的顶点
出发,以
的速度沿
路径匀速运动到
点停止.图(2)是
的面积
与运动时间
之间的函数关系图象.下列说法:①平行四边形
是菱形;②
;③
上的高
;④当
时,
.其中正确的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/22/81af47e7-8848-45b9-911a-944b39debd99.png?resizew=359)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6e4b232691562dc6ec2cd397f58809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab9091bc1886a3fd3d17160b2d41ded.png)
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【推荐2】如图,等边△ABC的顶点C和□DEFG的顶点D重合,且BC和DE在同一条直线上,AB=2,DG=2,DE=3,∠GDE=60°.现将△ABC沿D→E的方向以每秒1个单位的速度匀速运动,当点B与点E重合时停止运动,在这个运动过程中,△ABC与四边形DEFG的重合部分的面积S与运动时间t之间的函数关系的图象大致是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/29/5afe7ce2-ab35-4acf-b643-10a773b71c99.png?resizew=206)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/29/5afe7ce2-ab35-4acf-b643-10a773b71c99.png?resizew=206)
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【推荐1】如图,平行四边形
中,
,
,
,
是边
上一点,且
,
是边
上的一个动点,将线段
绕点
逆时针旋转
,得到
,连接
、
,则
的最小值是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b1927db96d84f27197b5a654b622f6.png)
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【推荐2】如图,A,B,C,D四个点顺次在直线l上,
.以
为底向下作等腰直角三角形
,以
为底向上作等腰三角形
,且
.连接
,当
的长度变化时,
与
的面积之差保持不变,则a与b需满足( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/ecf6e34b-f34b-48f2-bcf0-1d5fb3a2e3b7.png?resizew=148)
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【推荐1】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( )
![](https://img.xkw.com/dksih/QBM/2022/4/2/2949498518298624/2953038060658688/STEM/0d3b0be7da3a452484071f7192f4fbfd.png?resizew=165)
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A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】定义:如果一个三角形有一边上的中线等于这条边的一半,那么称三角形为“智慧三角形”.如图,在平面直角坐标系
中,矩形
的边
,点
,在边
存在点
,使得
为“智慧三角形”,则点
的坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98fc24da590e2a8973e72744c7b3ce8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b5582d7883a286a1b981fe6aaf7529.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ae7d7f5a3bba2a5fe4f84a3b96bde7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐3】对于题目:“如图1,平面上,正方形内有一长为
、宽为
的矩形,它可以在正方形的内部及边界通过移转(即平移或旋转)的方式,自由地从横放移转到竖放,求正方形边长的最小整数
.”甲、乙、丙作了自认为边长最小的正方形,先求出该边长
,再取最小整数
.
甲:如图2,思路是当
为矩形对角线长时就可移转过去;结果取
.
乙:如图3,思路是当x为矩形外接圆直径长时就可移转过去;结果取n=14.
丙:如图4,思路是当
为矩形的长与宽之和的
倍时就可移转过去;结果取
.
下列正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/3fe3eb7c-7f1a-47d5-ad51-678cc7520bfc.png?resizew=501)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
甲:如图2,思路是当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/542b9547dc9b690b0c10d4b285fbb684.png)
乙:如图3,思路是当x为矩形外接圆直径长时就可移转过去;结果取n=14.
丙:如图4,思路是当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/542b9547dc9b690b0c10d4b285fbb684.png)
下列正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/30/3fe3eb7c-7f1a-47d5-ad51-678cc7520bfc.png?resizew=501)
A.甲的思路错,他的![]() |
B.乙的思路和他的![]() |
C.甲和丙的![]() |
D.甲、乙的思路都错,而丙的思路对 |
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