1 . 小亮同学喜欢研究数学问题.他在一本资料中看到一个新的数学概念“对角线互相垂直且相等的四边形叫做垂等四边形”,并对垂等四边形进行了研究.具体内容如下:
(1)如图1,在平面直角坐标系
中,已知四边形
是垂等四边形,点
的坐标为
,点
的坐标为
,求点
的坐标;
【规律初探】
(2)如图2,正方形
的边长为
,点
在边
上,点
在边
上,点
在边
上,点
在边
上,若四边形满足
,请直接写出四边形
面积S的取值范围;
【综合探究】
(3)如图3,已知抛物线
与
轴交于
、
两点,点
在点
的左侧,
、
两点在该抛物线上.若以
、
、
、
为顶点的四边形是垂等四边形且
.设点
的横坐标为
,点
的横坐标为
,且
,求m的值.
(1)如图1,在平面直角坐标系
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cfa2a6d9749a619edf80bad8b3e4962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fed700b7a3ab2ee7fbae12507033af9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
【规律初探】
(2)如图2,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9016de3d17a389fb5d0952f616c19e0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
【综合探究】
(3)如图3,已知抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3236d825b994ee9c28e5d5479a57b8ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947aed0181a8c0bd81c6ebeba8d1ddc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7091d529281abff275ef19b9197445a7.png)
您最近一年使用:0次
2024-06-04更新
|
105次组卷
|
2卷引用:2024年山东省潍坊市昌邑市中考一模数学试题
2 . 小亮同学喜欢研究数学问题.他在一本资料中看到一个新的数学概念“对角线互相垂直且相等的四边形叫做垂等四边形”,并对垂等四边形进行了研究.具体内容如下:
中,已知四边形
是垂等四边形,点A的坐标为
,点C的坐标为
,求点B的坐标;
(2)【规律初探】如图2,正方形
的边长为a,点E在边
上,点F在边
上,点G在边
上,点H在边
上,若四边形满足
,请直接写出四边形
面积S的取值范围;
(3)【综合探究】如图3,已知抛物线
与x轴交于M,N两点,点M在点N的左侧,P,Q两点在该抛物线上.若以M,N,P,Q为顶点的四边形是垂等四边形且
.设点P的横坐标为m,点Q的横坐标为n,且
,求m的值.
![](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/8ea781875e43a5d70942f6e258054572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88a1f304d24f867811ff75447f50f15.png)
(2)【规律初探】如图2,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9016de3d17a389fb5d0952f616c19e0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
(3)【综合探究】如图3,已知抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3236d825b994ee9c28e5d5479a57b8ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966a7257fd3af3a4049844773c611e26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7091d529281abff275ef19b9197445a7.png)
您最近一年使用:0次
解题方法
3 . 在平面直角坐标系中,正方形
.... 按如图的方式放置.点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6fa157b4f65f3a9aa1f7f82de02e99e.png)
和点
分别落在直线
和
轴上.抛物线
过点
,且顶点在直线
上,抛物线
过点
,且顶点在直线
上,...按此规律,抛物线
,过点
, 且顶点也在直线
上,其中抛物线
交正方形
的边
于点
,抛物线
交正方形
的边
于点
(其中
且
为正整数) .
![](https://img.xkw.com/dksih/QBM/2020/6/13/2483964632473600/2490836832387072/STEM/555ee502d9a54be0accb00a3a636850f.png?resizew=242)
(1)直接写出下列点的坐标:
,
;
(2)写出抛物线
的解析式,并写出抛物线
的解析式求解过程,再猜想抛物线
的顶点坐标;
(3)设
,试判断
与
的数量关系并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4199aa55eb5fb05df0b30b8d3843d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6fa157b4f65f3a9aa1f7f82de02e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e236164ff13821bf89d44d5567d9e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8867cd3df8b73f4310ceb06698b02ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7090adf670566a2d7ce5903924d72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172722d11ea7e01411fa06dbb82f46ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8454989732716850cb57ca15f8ef596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7090adf670566a2d7ce5903924d72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9170eff5345d2b8d3dd4ee0ae2d747e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7090adf670566a2d7ce5903924d72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a2d3cd8e283ae9d04bee5ab2e0895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b64f109cde567dc5750276a16a6b774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7090adf670566a2d7ce5903924d72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4635a4e561d862638f6818e85e74bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87f93f4e10d9672fa6bd67243bc23d4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/220a67f3143cc51f6496c874d3ce4f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34876d748f30fa4fc2eb6a686b5ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c296e45b84cf67a98939aa7334e7d478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e167b43045b3297248e334c41c621b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/2020/6/13/2483964632473600/2490836832387072/STEM/555ee502d9a54be0accb00a3a636850f.png?resizew=242)
(1)直接写出下列点的坐标:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
(2)写出抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381f6607209c8ee66bac5c49878e41fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbd49bf20f987c05b4d36e31549075c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5a2d3cd8e283ae9d04bee5ab2e0895b.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec2721bded1b09f1b03d030f0fe35a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
您最近一年使用:0次
2020-06-23更新
|
412次组卷
|
3卷引用:2020年江西省宜春市九年级中考一模数学试题
4 . 阅读材料,解答问题.
材料:“小聪设计的一个电子游戏是:一电子跳蚤从这P1(﹣3,9)开始,按点的横坐标依次增加1的规律,在抛物线y=x2上向右跳动,得到点P2、P3、P4、P5…(如图1所示).过P1、P2、P3分
别作P1H1、P2H2、P3H3垂直于x轴,垂足为H1、H2、H3,则S△P1P2P3=S梯形P1H1H3P3﹣S梯形P1H1H2P2﹣S梯形P2H2H3P3=
(9+1)×2﹣
(9+4)×1﹣
(4+1)×1,即△P1P2P3的面积为1.”
问题:
(1)求四边形P1P2P3P4和P2P3P4P5的面积(要求:写出其中一个四边形面积的求解过程,另一个直接写出答案);
(2)猜想四边形Pn﹣1PnPn+1Pn+2的面积,并说明理由(利用图2);
(3)若将抛物线y=x2改为抛物线y=x2+bx+c,其它条件不变,猜想四边形Pn﹣1PnPn+1Pn+2的面积(直接写出答案).
材料:“小聪设计的一个电子游戏是:一电子跳蚤从这P1(﹣3,9)开始,按点的横坐标依次增加1的规律,在抛物线y=x2上向右跳动,得到点P2、P3、P4、P5…(如图1所示).过P1、P2、P3分
![](https://img.xkw.com/dksih/QBM/2019/3/8/2155948540821504/2161573096882176/STEM/732341a2685c4038946ca833a7b29412.png?resizew=5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
问题:
(1)求四边形P1P2P3P4和P2P3P4P5的面积(要求:写出其中一个四边形面积的求解过程,另一个直接写出答案);
(2)猜想四边形Pn﹣1PnPn+1Pn+2的面积,并说明理由(利用图2);
(3)若将抛物线y=x2改为抛物线y=x2+bx+c,其它条件不变,猜想四边形Pn﹣1PnPn+1Pn+2的面积(直接写出答案).
![](https://img.xkw.com/dksih/QBM/2019/3/8/2155948540821504/2161573096882176/STEM/eb3697c99be94d82bf5ac8c5c2454cf0.png?resizew=419)
您最近一年使用:0次
5 . 如图,在四边形ABCD中,AD∥BC,∠ADC=90°,点E是BC边上一动点,连接AE,过点E作AE的垂线交直线CD于点F.已知AD=4cm,CD=2cm,BC=5cm,设BE的长为x cm,CF的长为y cm.
![](https://img.xkw.com/dksih/QBM/2018/1/18/1863056000802816/1863964255264768/STEM/40801d91fe29491bb4679be0ac4a4b06.png?resizew=185)
小东根据学习函数的经验,对函数y随自变量x的变化而变化的规律进行探究.下面是小东的探究过程,请补充完整:
(1)通过取点、画图、测量,得到了x与y的几组值,如下表:
![](https://img.xkw.com/dksih/QBM/2018/1/18/1863056000802816/1863964255264768/STEM/0e21f6c0e4ef40569bf8744edb732363.png?resizew=603)
(说明:补全表格时相关数据保留一位小数)
(2)建立直角坐标系,描出以补全后的表中各对对应值为坐标的点,画出该函数的图象;
![](https://img.xkw.com/dksih/QBM/2018/1/18/1863056000802816/1863964255264768/STEM/d9988fd7b7324931a4f52951e6c1375e.png?resizew=323)
(3)结合画出的函数图象,解决问题: 当BE=CF时,BE的长度约为 cm.
![](https://img.xkw.com/dksih/QBM/2018/1/18/1863056000802816/1863964255264768/STEM/40801d91fe29491bb4679be0ac4a4b06.png?resizew=185)
小东根据学习函数的经验,对函数y随自变量x的变化而变化的规律进行探究.下面是小东的探究过程,请补充完整:
(1)通过取点、画图、测量,得到了x与y的几组值,如下表:
![](https://img.xkw.com/dksih/QBM/2018/1/18/1863056000802816/1863964255264768/STEM/0e21f6c0e4ef40569bf8744edb732363.png?resizew=603)
(说明:补全表格时相关数据保留一位小数)
(2)建立直角坐标系,描出以补全后的表中各对对应值为坐标的点,画出该函数的图象;
![](https://img.xkw.com/dksih/QBM/2018/1/18/1863056000802816/1863964255264768/STEM/d9988fd7b7324931a4f52951e6c1375e.png?resizew=323)
(3)结合画出的函数图象,解决问题: 当BE=CF时,BE的长度约为 cm.
您最近一年使用:0次