如图,先将三角形
向右平移3个单位长度,再向上平移4个单位长度,得到三角形
.
(2)皮克定理:数学上把在平面直角坐标系中横、纵坐标均为整数的点称为格点,计算点阵中顶点在格点上的多边形面积公式:
,其中a表示多边形内部的点数,b表示多边形边界上的点数,s表示多边形的面积.若用皮克定理求
三角形的面积,则
___________,
___________,
___________;
(3)将直线
以每秒1个单位长度的速度向下平移,平移______秒时该直线恰好经过点
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
(2)皮克定理:数学上把在平面直角坐标系中横、纵坐标均为整数的点称为格点,计算点阵中顶点在格点上的多边形面积公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5824650069d2b950405b4bffe018b4f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c587f03de391e7769c25198d78d09ad.png)
(3)将直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27c59a593a0dd02859364a57fd100c55.png)
22-23七年级下·湖北鄂州·期末 查看更多[4]
湖北省鄂州市2022-2023学年 七年级下学期期末数学试题湖北省广水市2023-2024学年七年级下学期期中数学试题湖北省随州市广水市西协作区联考2023-2024学年七年级下学期期中数学试题(已下线)专题05平面直角坐标系中的规律、面积和新定义问题(三大题型)-【好题汇编】备战2023-2024学年七年级数学下学期期末真题分类汇编(湖北专用)
更新时间:2023-08-04 10:48:34
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相似题推荐
解答题-问答题
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【推荐1】如图,在平面直角坐标系中,点A,B的坐标分别为
,现同时将点A,B分别向上平移2个单位,再向右平移1个单位,分别得到点A,B的对应点C,D,连接
.
的面积
;
(2)在y轴上是否存在一点P,连接
,使
?若存在这样一点,求出点P的坐标;若不存在,试说明理由;
(3)点P是线段
上的一个动点,连接
,当点P在
上移动时(不与B,D重合)给出下列结论:
①
的值不变,②
的值不变,其中有且只有一个是正确的,请你找出这个结论并求其值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba9ef9ce62b3d92b8316bd8b6fd1ad9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d5d18c533ed55b64f7f796e504b68a7.png)
(2)在y轴上是否存在一点P,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a1dd47d59b9755e1815f18f3e22ef81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe80a24a844428aef05121da8386450.png)
(3)点P是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8305b4f30ec8b02efa26cb20f2bd70f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211bbbcbe8fb843166d3f3781bbfac96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75b40336e9829f7a8c89df4e1ea62a9.png)
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【推荐2】如图,两条数轴x轴,y轴互相垂直交于点
,点
为原点,
,其中m,n是二元一次方程组
的解,过点
作
轴的平行线交
轴于点
.
______,
______,
______.
(2)动点
从点
出发,以每秒4个单位长度的速度沿射线
的方向运动,连接
,设点
的运动时间为
秒,三角形
的面积为
,请用含
的式子表示
(写出相应的
的取值范围);
(3)在(2)的条件下,在动点
从点
出发的同时,动点
从点
出发以每秒1个单位长度的速度沿线段
的方向运动,过点
作直线
的垂线,点
为垂足;过点
作直线
的垂线,点
为垂足.当
时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d38ecf836524c4d6e59f4e404ac7960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a2ff21789f367dc757d9e1d31c0482f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae248960d8c1677cf948f8251275e863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a836d2dfc31d2bfc949bac8403cf2a4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1bc69e886c7afedf1c9233e9a2a6870.png)
(2)动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81691e15c8ffc602ece947edf6b44933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcec4ac7e09eb8b0e342f4f74f7feb65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)在(2)的条件下,在动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7c73e5c8ac9155452e5431f083f671.png)
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【推荐1】如图在方格纸中,
的顶点都在方格纸的格点上.
平移后得到
,图中已画出
点的对应点
,请补全
;
(2)画出
的高
;
(3)直接写出
和
的关系:______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
(2)画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaebc9408ba1baf77c436b68a0dacce7.png)
(3)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
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【推荐2】如图,平面直角坐标系中,点A在y轴上,坐标为
,将线段OA沿x轴方向平移3个单位得到线段CB.点D是线段BC上一动点(不与点B,C重合),AE平分
,OE平分
,AE与OE交于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/19/a375cd4f-2674-4ac4-a7bb-106aa80185c3.png?resizew=235)
(1)线段AB与OC有怎样的位置关系和数量关系________;点B的坐标为________;
(2)若
,直接写出∠AEO的度数________;
(3)点D在线段BC上运动时(不与点B,C重合),猜想:
与
有怎样的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c76c41773aae617db1c0cc04bcf836f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/19/a375cd4f-2674-4ac4-a7bb-106aa80185c3.png?resizew=235)
(1)线段AB与OC有怎样的位置关系和数量关系________;点B的坐标为________;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbe4b8e6819fa0b4d3a09d19a6934e5.png)
(3)点D在线段BC上运动时(不与点B,C重合),猜想:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c122873803fb37d6d916b1d919c08ba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565d0de7845e77737b774e8db6d43ee1.png)
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【推荐3】在平面直角坐标系中,点O为原点,点
是y轴负半轴上一点,将点B向右平移6个单位得到点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/c39f7aea-3ada-4d3e-85c0-4f1ab626ea71.png?resizew=399)
(1)如图1,动点P从点B出发,以每秒2个单位长度的速度沿
方向运动,同时动点Q从点O出发,以每秒3个单位长度的速度沿y轴向上运动,当点P运动到点A时,P、Q同时停止运动,设点P运动时间为t秒.用含t的式子表示P,Q两点的坐标.
(2)如图2,点D为线段
(端点除外)上某一点,当点D在线段上运动时,过点D作直线
交x轴正半轴于E,交直线
于F,
的平分线相交于点N,若
,请用含
的式子表示
的大小,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3c9cc823b331f0c211c1541d9bdb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056d589a61df9a70a8274af9e3926904.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/c39f7aea-3ada-4d3e-85c0-4f1ab626ea71.png?resizew=399)
(1)如图1,动点P从点B出发,以每秒2个单位长度的速度沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
(2)如图2,点D为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aac713169ca8bb782ad2be6de121bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e89a1c7137daf392f651d05cecc4446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ceffb4863ba72e40b78908bb80617a4.png)
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