直线
与x轴交于点A,与y轴交于点B,菱形
如图放置在平面直角坐标系中,其中点D在x轴负半轴上,直线
经过点C,交x轴于点E.
(2)点
是线段
上的一个动点(点P不与O、B重合),经过点P且平行于x轴的直线交
于M,交
于N.当四边形
是平行四边形时,求点P的坐标;
(3)点
是y轴正半轴上的一个动点,Q是平面内任意一点,t为何值时,以点C、D、P、Q为顶点的四边形是菱形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b098e17fa76c648424e9cadf558cc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479885d4ab2f717d2e97718da04b43.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccc7be55c17e88b24377a0207175903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b14c0e4e6f6769f1eb400afc4aac8e3.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccc7be55c17e88b24377a0207175903.png)
22-23八年级下·吉林长春·期末 查看更多[3]
吉林省长春市第一〇八学校2022-2023学年八年级下学期期末数学试题(已下线)考题猜想3-3平行四边形(重难点,特殊四边形的性质在动点问题中的巧用)-2023-2024学年八年级数学下学期期末考点大串讲(人教版)(已下线)专题08 一次函数与几何综合问题程期末真题汇编【六大题型+优选提升题】-备战2023-2024学年八年级数学下学期期末真题分类汇编(人教版)
更新时间:2023-09-12 09:38:15
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解答题-问答题
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真题
【推荐1】如图,四边形OABC是面积为4的正方形,函数
(x>0)的图象经过点B.
(1)求k的值;
(2)将正方形OABC分别沿直线AB、BC翻折,得到正方形MABC′、MA′BC.设线段MC′、NA′分别与函数
(x>0)的图象交于点E、F,求线段EF所在直线的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
(1)求k的值;
(2)将正方形OABC分别沿直线AB、BC翻折,得到正方形MABC′、MA′BC.设线段MC′、NA′分别与函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://img.xkw.com/dksih/QBM/2012/6/21/1573413447409664/1573413493522432/STEM/c6e22408-4642-4712-acbf-8067c281a726.png)
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名校
【推荐2】点
在第一象限,且
,点A的坐标为
.设
的面积为S.
(1)用含x的式子表示S,并写出x的取值范围,在下面给定的坐标系中画出函数S的图像;
(2)当点P的横坐标是6时,
_______;
(3)
的面积能否大于24,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31b9442c77f394e24f722e626d85d249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb13bbc5335efc427f9c619a51dae3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7793c816ad466210b63dcd988f5b80e5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/11/179535c8-dd94-4473-b860-01d11be35efd.png?resizew=210)
(1)用含x的式子表示S,并写出x的取值范围,在下面给定的坐标系中画出函数S的图像;
(2)当点P的横坐标是6时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7793c816ad466210b63dcd988f5b80e5.png)
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【推荐1】如图,在
中,
,将
绕点C顺时针旋转得到
,
与
交于点O,点B的对应点为E,点A的对应点D落在线段
上,连接
.
平分
;
(2)试判断
与
的位置关系,并说明理由;
(3)若
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
(2)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b3a6afb6eb425b53def6e1af3b7121.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f2281cb6df0c3c518ce5ed19a02b57e.png)
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解答题-计算题
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【推荐2】已知点E在正方形
的对角线
上,正方形
与正方形
有公共点A.
![](https://img.xkw.com/dksih/QBM/2023/5/26/3245908226949120/3246618280050688/STEM/a571e58daac948b9b241e9b1ce44a7bb.png?resizew=375)
(1)【特例发现】如图1,当点G在
上,F在
上,求
的值;
(2)【探究发现】如图2,将正方形
绕A点逆时针方向旋转
,求
的值;
(3)【问题解决】
,将正方形
绕A逆时针方向旋转
,当C,G,E三点共线时,请计算出
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f875de8bec0ffc84b8142f81080058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2023/5/26/3245908226949120/3246618280050688/STEM/a571e58daac948b9b241e9b1ce44a7bb.png?resizew=375)
(1)【特例发现】如图1,当点G在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41270211a0a0f3ff3b01826bc1e8bbe.png)
(2)【探究发现】如图2,将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f875de8bec0ffc84b8142f81080058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb1aa7bc4a01962fc1297f17fa9128f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41270211a0a0f3ff3b01826bc1e8bbe.png)
(3)【问题解决】
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd17ce491bfef61d36c2b41651019e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f875de8bec0ffc84b8142f81080058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813472fe85905302843cb3aadec9c8ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
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【推荐1】已知,平行四边形
中,一动点
在
边上,以每秒
的速度从点A向点
运动.
平分
,且满足
,求
的度数.
(2)如图②,在第(1)问的条件下,连接
并延长,与
的延长线交于点
,连接
,若
,求
的面积.
(3)如图③,另一动点
在
边上,以每秒
的速度从点
出发,在
间往返运动,两个点同时出发,当点
到达点
时停止运动(同时
点也停止).若
,设点
的运动时间为
秒,当
为何值时,以
,
,
,
四点组成的四边形是平行四边形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048b61a5fb5f420c6d7de88db5bc3aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/899c3e832543324201dbe63b563295ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(2)如图②,在第(1)问的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6747441b260ca043446b5d472fece440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceff3844281849df3e37a2e56e110549.png)
(3)如图③,另一动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7cc6ebe3a443327530a2538e4013fc5.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/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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解答题-证明题
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【推荐2】如图,在
中,
分别平分
,交
于点
.
;
(2)连接
,证明
;
(3)过点
作
,垂足为
.若
的周长为
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9962e4b61d0a856eaeb32aa6f6864247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a3f0bff977fd039f3fc3eb948872015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01882f77f211b5b82111bc2953f01d7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ab31986b82793f3f1b627e61f77afee.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5f3a9809eff933114eed37314886e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72a1fe2f4c72c493a8d2c2a202888d2.png)
(3)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa620bba268aab427750a29addb0f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-问答题
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适中
(0.65)
【推荐1】如图,在
中,
厘米,
厘米,点
为
的中点,已知点
在线段
上由点
出发向终点
运动,同时点
在线段
上由点
出发向终点
运动.设运动时间为
秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/b1590c31-404a-4503-be88-e2e5400044d3.png?resizew=102)
(1)若点
的速度是3厘米/秒,用含
的式子表示线段
和
的长度;
(2)若点P的速度是3厘米/秒,点Q的速度是a厘米/秒,且
和
恰好全等,求出相对应的a和t的值;
(3)若点P比点Q的运动速度每秒快1厘米,请直接写出t为何值时,
是以
为顶角、
是以
为顶角的等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eeb0c8df3d8c5260768c5e407b3583a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/b1590c31-404a-4503-be88-e2e5400044d3.png?resizew=102)
(1)若点
![](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/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
(2)若点P的速度是3厘米/秒,点Q的速度是a厘米/秒,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983add910c8e09954f164a5e87d1f7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
(3)若点P比点Q的运动速度每秒快1厘米,请直接写出t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983add910c8e09954f164a5e87d1f7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
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【推荐2】阅读与思考
请使用分组分解法解决以下问题:
(1)分解因式:
.
(2)已知
三边
满足
,请判断
的形状并说明理由.
我们熟知的因式分解的方法有提取公因式法、公式法和十字相乘法.但有时遇到 了四项及以上的多项式要进行因式分解时.就往往不知从何下手了.因此,针对四项 及以上的多项式因式分解.我们通常使用的方法是分组分解法:将多项式分成多个小 组,每个小组单独进行因式分解.再利用提取公因式法或者公式法对整体进行因式分 解.请观察以下使用分组分解法进行因式分解的过程: ![]() ![]() ![]() ![]() ![]() |
(1)分解因式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640e4878e005e10b2f941200490ef0db.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f2599ca8b6b683e57a82699c8b1ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1302ed93d12154bc745c5610754138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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