名校
1 . 【问题背景】
(1)如图1,在
中,
,
于
,求证:
;
【变式迁移】
(2)如图2,已知
,
为
上一点,且
,若
,求
的值;
【拓展创新】
(3)如图3,四边形
中,
,
,
为边
上一点,且
,
,直接写出
的值.
(1)如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0959456ec799641051805c166b26d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d32a21d49d9e1ddbd4714a5dce7898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a924a4f246a922729c17cf133b4dbf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/4d36eaf0-e542-421a-9009-624cf4b539f3.png?resizew=150)
【变式迁移】
(2)如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e684053e2c83fb220cc1cbc53a1296de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34307eeaec4890fdbb49fd5b592bfc00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4eaea4522b6983a79042a4d0c9cb18c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1672bf7cfa9a741651889f41855f6f3b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/063741d0-1522-487e-9b95-605ab5ad3ac5.png?resizew=150)
【拓展创新】
(3)如图3,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f03dcfb999a39e937dba9d0d7247209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c029f2663b3fd557c9169e295c353e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34307eeaec4890fdbb49fd5b592bfc00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404356b10bbac4eeb9b603cbb26d4e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c06b39a3804e08a580e8defa3e84cb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/13/010c3133-bc62-4322-97b3-125c9f93f087.png?resizew=140)
您最近一年使用:0次
2024-01-08更新
|
284次组卷
|
10卷引用:安徽省合肥市包河区四十八中2022-2023学年九年级上学期期末数学试题
安徽省合肥市包河区四十八中2022-2023学年九年级上学期期末数学试题2022年湖北省武汉市江汉区三月份中考数学模拟试题(已下线)必刷卷01-2022年中考数学考前信息必刷卷(深圳专用)(已下线)必刷卷02-2022年中考数学考前信息必刷卷(深圳专用)2022年湖北省武汉市一初慧泉中学九年级下学期3月考数学试题(已下线)安徽省合肥市2023-2024学年九年级上学期月考数学试题(已下线)安徽省合肥市部分学校2023-2024学年九年级上学期月考数学试题2023年湖北省黄冈市、孝感市、咸宁市中考三模数学试题广东省深圳市福田区红岭中学初中部2023-2024学年九年级上学期月考数学试题(已下线)专题11 相似三角形模型(K字型)专项训练-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(广东专用)
2 . 数学模型学习与应用.【学习】如图1,
,
,
于点C,
于点E.由
,得∠1=∠D;又
,可以通过推理得到
≌
.我们把这个数学模型称为“一线三等角”模型;
![](https://img.xkw.com/dksih/QBM/2022/3/19/2939647616770048/2945275028848640/STEM/1326f9a3-de66-4c1a-bf79-ffc22204216e.png?resizew=651)
(1)【应用】如图2,点B,P,D都在直线l上,并且
.若
,
,
,用含x的式子表示CD的长;
(2)【拓展】在
中,点D,E分别是边BC,AC上的点,连接AD,DE,
,
,
.若
为直角三角形,求CD的长;
(3)如图3,在平面直角坐标系xOy中,点A的坐标为
,点B为平面内任一点.
是以OA为斜边的等腰直角三角形,试直接写出点B的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76223401f248186796d5198d7a90aac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd9776aa108071b50b71adf181bbdaf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b43490ca09467a4c8cd8cfe91c94e4.png)
![](https://img.xkw.com/dksih/QBM/2022/3/19/2939647616770048/2945275028848640/STEM/1326f9a3-de66-4c1a-bf79-ffc22204216e.png?resizew=651)
(1)【应用】如图2,点B,P,D都在直线l上,并且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f862e41c808089a9dc392d62155386a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a666403569e607f32af5f762c246dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432cce1481829c4dfe2bd557f6e9aa4c.png)
(2)【拓展】在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af1fdd476e86e5b709835f0ce3c3601c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
(3)如图3,在平面直角坐标系xOy中,点A的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5511a368692de27c58ec48ce968de4a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
您最近一年使用:0次
2022-03-27更新
|
326次组卷
|
5卷引用:安徽省淮北市五校2021-2022学年九年级下学期第一次月考数学试题
安徽省淮北市五校2021-2022学年九年级下学期第一次月考数学试题2022年安徽省合肥市庐江县柯坦乐桥片区中考数学第一次模拟试卷(已下线)专题4.37 相似三角形几何模型-一线三等角(知识讲解)-2022-2023学年九年级数学上册基础知识专项讲练(北师大版)(已下线)专题27.32 相似三角形几何模型-一线三等角(知识讲解)-2022-2023学年九年级数学下册基础知识专项讲练(人教版)(已下线)专题6.35 相似三角形几何模型-一线三等角(知识讲解)-2022-2023学年九年级数学下册基础知识专项讲练(苏科版)
3 . 如图,
是经过
顶点
的一条直线,
,
,
分别是直线
上两点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/8837f762-3add-49a6-9d9b-07a24be459e4.png?resizew=360)
[数学思考]
(1)若直线
经过
的内部,且
,
在射线
上.
请解决下面两个问题:
①如图1,若
,
,则
,
;(填“
”、“
”或“
”)
②如图2,若
,当
与
之间满足 时,能够使得①中的两个结论仍然成立,并证明两个结论.
(2)[问题拓展]如图3,若直线
经过
的外部,
,请提出
,
,
三条线段数量关系的合理猜想(不要证明).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8178a430ab04499222bae632c257f49a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1553fa372a8a8745647e39bb8a659e6e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/8837f762-3add-49a6-9d9b-07a24be459e4.png?resizew=360)
[数学思考]
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
请解决下面两个问题:
①如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ee0ca4353f0b7de731ca9616eaccce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0614db53b1d1e154cef130597bed8108.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6efd7dc1f7b9c6c1d812d52296cac6e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
②如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424da1eca673f997ca4547575edeec1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)[问题拓展]如图3,若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c029e4ab80f8a2080d59ba73841f364f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
您最近一年使用:0次
2022-12-28更新
|
165次组卷
|
2卷引用:安徽省淮南市谢家集区2022-2023学年八年级上学期期中数学试卷
4 . 课外拓展课活动上,老师带领社团成员在不涉水的情况下测量校内一条小河的宽度(该段河流两岸互相平行),具体操作过程如下:
请根据上述过程,解答下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/702c6a15-b94f-4032-bb49-0a09317bb377.png?resizew=157)
(1)河流
的宽度为________
;
(2)请你根据所学知识,解释该做法的合理性.
序号 | 操作过程 |
① | 在河流此岸 |
② | 沿河岸向左走 |
③ | 从 |
④ | 测得 |
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/702c6a15-b94f-4032-bb49-0a09317bb377.png?resizew=157)
(1)河流
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5022abc6afd4deff13845419fa38312e.png)
(2)请你根据所学知识,解释该做法的合理性.
您最近一年使用:0次
2022-12-12更新
|
145次组卷
|
3卷引用:安徽省阜阳市颍泉区2022-2023学年八年级上学期期中教学质量检测数学试题
安徽省阜阳市颍泉区2022-2023学年八年级上学期期中教学质量检测数学试题(已下线)专题4.43 三角形(全章复习与巩固)(基础篇)(专项练习)-2022-2023学年七年级数学下册基础知识专项讲练(北师大版)山西省吕梁市兴县红旗中学2023-2024学年八年级上学期第一次月考数学试题
5 .
和
都是等腰直角三角形,
,
是
的中点,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/843e839a-a3db-4a63-9834-1e1e6cdc6d95.png?resizew=435)
(1)如图①,当点
、
分别是线段
、
上的点时,求
的度数;
(2)如图②,当点
是线段
上的点时,求证:
;
(3)如图③,当点
、
、
共线且
是
的中点时,探究
和
之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefe4a3e7a7fa195ed6a6712447639b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0a9564aa238dc7ee469611c64ed415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/843e839a-a3db-4a63-9834-1e1e6cdc6d95.png?resizew=435)
(1)如图①,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf5abf272ec71a31819dbe08cac85826.png)
(2)如图②,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/243a6e9e7ece8ef97bc98fb1dea0241d.png)
(3)如图③,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ff575e55857af133edb24c8e61504f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0db4223881d1d6a382a2772d4a4957c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae05ae33d3abfc1a1cd41635929ae858.png)
您最近一年使用:0次
名校
6 . 阅读下面材料:
数学课上,老师出示了这样一个问题:
如图1,在Rt
ABC中,CB=CA,∠C=90°,∠CAB的平分线与外角∠CBE的平分线相交于点D,过点B作BK⊥AD于点K,设AD交BC于点F,探究AF与BD之间的数量关系,并证明
某学习小组的同学经过思考,交流了自己的想法:
小明:“通过观察和度量,发现∠D的值是固定的.”
小强:“通过观察和度量,发现图1中∠CAF与∠KBF存在某种数量关系.”
小伟:“因为AF平分∠BAC,BK⊥AD,所以通过构造三角形,再通过证明三角形全等,进而可以得到AF与BD之间的数量关系.”
……
老师:“如图2,若CB≠CA,再过点D作DM⊥BC,垂足为点M,DM与BK交于点N.如果给出
的值,那么可以求出
的值”
(1)∠D的度数为 ;
(2)探究AF与BD之间的数量关系;
(3)当CB≠CA时,若
(n>1),求
的值(用含n的代数式表示)
![](https://img.xkw.com/dksih/QBM/2021/10/25/2836930162720768/2838409359122432/STEM/6e9d2b57-928e-4346-ae57-e0a85d6d2d0b.png?resizew=252)
数学课上,老师出示了这样一个问题:
如图1,在Rt
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
某学习小组的同学经过思考,交流了自己的想法:
小明:“通过观察和度量,发现∠D的值是固定的.”
小强:“通过观察和度量,发现图1中∠CAF与∠KBF存在某种数量关系.”
小伟:“因为AF平分∠BAC,BK⊥AD,所以通过构造三角形,再通过证明三角形全等,进而可以得到AF与BD之间的数量关系.”
……
老师:“如图2,若CB≠CA,再过点D作DM⊥BC,垂足为点M,DM与BK交于点N.如果给出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/693fbadc9115c83097a555b7fc3ab380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8c9629304a690125c4ab28ea8454bf.png)
(1)∠D的度数为 ;
(2)探究AF与BD之间的数量关系;
(3)当CB≠CA时,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f74969679327984ee3cac45339503d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8c9629304a690125c4ab28ea8454bf.png)
![](https://img.xkw.com/dksih/QBM/2021/10/25/2836930162720768/2838409359122432/STEM/6e9d2b57-928e-4346-ae57-e0a85d6d2d0b.png?resizew=252)
![](https://img.xkw.com/dksih/QBM/2021/10/25/2836930162720768/2838409359122432/STEM/00407089-073a-420b-bfe3-6e74deee6d38.png?resizew=254)
您最近一年使用:0次
2021-10-27更新
|
189次组卷
|
2卷引用:安徽省滁州市定远县永康片2021-2022学年九年级下学期第三次教学质量监测数学试题
7 . 某数学兴趣小组在数学课外活动中,对多边形内两条互相垂直的线段做了如下探究:
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978620094267392/2980620169560064/STEM/68a73e1b-02f2-4cee-b3cc-5d7bf64ac332.png?resizew=540)
(1)如图1,在正方形ABCD中,E,F分别是AB,AD上的两点,连接DE,CF,若DE⊥CF,求证:CF=DE.
(2)如图2,在矩形ABCD中,过点C作CE⊥BD交AD于点E,若
,求
的值.
(3)如图3,在四边形ABCD中,∠A=∠B=90°,E为AB上一点,连接DE,过点C作DE的垂线交ED的延长线于点G,交AD的延长线于点F,且AB=5,AD=3,CF=7.求DE的长.
![](https://img.xkw.com/dksih/QBM/2022/5/4/2978620094267392/2980620169560064/STEM/68a73e1b-02f2-4cee-b3cc-5d7bf64ac332.png?resizew=540)
(1)如图1,在正方形ABCD中,E,F分别是AB,AD上的两点,连接DE,CF,若DE⊥CF,求证:CF=DE.
(2)如图2,在矩形ABCD中,过点C作CE⊥BD交AD于点E,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/968f5fd009e1d4c430529e24f8c92b47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8775dcf60ad143bc59a58b000f374c56.png)
(3)如图3,在四边形ABCD中,∠A=∠B=90°,E为AB上一点,连接DE,过点C作DE的垂线交ED的延长线于点G,交AD的延长线于点F,且AB=5,AD=3,CF=7.求DE的长.
您最近一年使用:0次
2022-05-16更新
|
396次组卷
|
6卷引用:2022年安徽省宣城市宣州区九年级中考第二次模拟考试数学试题
2022年安徽省宣城市宣州区九年级中考第二次模拟考试数学试题2022年安徽省宣州区九年级第二次模拟考试数学试题(已下线)专题08 图形的变换-5年(2018-2022)中考1年模拟数学分项汇编(安徽专用)2023年安徽省池州市贵池区等两地部分学校联考中考二模数学试题(已下线)专题14 四边形综合题(针对20、22、23题) -学易金卷:五年(2019-2023)中考1年模拟数学真题分项汇编(安徽专用)(已下线)2023年安徽二模几何综合3
8 . 四边形ABCD是一张矩形纸片,点E在AD上,将△ABE沿BE折叠,使点A落在矩形的对角线BD上,连接CF,若DE=1,请探究下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/2386fc64-283d-4621-9f86-e84e5ab78f31.png?resizew=263)
(1)如图1,当F恰好为BD的中点时,AE= ;
(2)如图2,当点C、E、F在同一条直线上时,AE= .
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/1/2386fc64-283d-4621-9f86-e84e5ab78f31.png?resizew=263)
(1)如图1,当F恰好为BD的中点时,AE= ;
(2)如图2,当点C、E、F在同一条直线上时,AE= .
您最近一年使用:0次
2022-03-17更新
|
174次组卷
|
2卷引用:安徽省合肥市高新区2021-2022学年九年级上学期期末数学试题
名校
9 . 如图,二次函数
的图象与x轴交于A,B两点与y轴交于点C,作
轴交函数图象上于点E,已知
,
,直线是抛物线的对称轴,D是抛物线的顶点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/3f03a687-6482-44ad-8c93-ef242f061066.png?resizew=155)
(1)求二次函数的解析式;
(2)连接AD,线段
上的点N关于直线l的对称点
恰好在线段
上,求点N的坐标;
(3)探究:抛物线的对称轴上是否存在点T,使得线段
绕点T逆时针旋转
后,点B的对应点
恰好也落在此抛物线上?若存在,求出点T的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0970cffbe8950fb3a631056dfe91f3a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a9b5996067a3fc9adcf0ca178dddf03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07336cc4961c721ee1dbed27a92f23b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/3f03a687-6482-44ad-8c93-ef242f061066.png?resizew=155)
(1)求二次函数的解析式;
(2)连接AD,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b1ba4307cfde9b424d468bfcdf6c5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(3)探究:抛物线的对称轴上是否存在点T,使得线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/817a419430d9951cbdb89b657b21bcf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
您最近一年使用:0次
2022-12-14更新
|
145次组卷
|
3卷引用:安徽省芜湖市镜湖区2022-2023学年九年级上学期期中模拟考试数学试卷
名校
10 . 【背景知识】研究平面直角坐标系,我们可以发现一条重要的规律:若平面直角坐标系上有两个不同的点
、
,则线段AB的中点坐标可以表示为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8c26ef38b4e89509e9063135750770.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/3d93f7d1-b200-46a5-a4d0-a6d4ab2a7627.png?resizew=470)
【简单应用】如图1,直线AB与y轴交于点
,与x轴交于点
,过原点O的直线L将
分成面积相等的两部分,请求出直线L的解析式;
【探究升级】小明发现“若四边形一条对角线平分四边形的面积,则这条对角线必经过另一条对角线的中点”
如图2,在四边形ABCD中,对角线AC、BD相交于点O,
试说明
;
【综合运用】如图3,在平面直角坐标系中
,
,
,若OC恰好平分四边形OACB的面积,求点C的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe47a813432a63b7f4afd94a4fa9107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc1dbd7e2f60f0dcd559209d35bec6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8c26ef38b4e89509e9063135750770.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/3d93f7d1-b200-46a5-a4d0-a6d4ab2a7627.png?resizew=470)
【简单应用】如图1,直线AB与y轴交于点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60010cba80d14fea830ee1f03c6dad6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d552ee3c32a8976ff5767daaafac770c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12cfce6bedc9e8962a4a8b9afce4d4a9.png)
【探究升级】小明发现“若四边形一条对角线平分四边形的面积,则这条对角线必经过另一条对角线的中点”
如图2,在四边形ABCD中,对角线AC、BD相交于点O,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4252d7a512f43ed2539b0e04afdffdd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4738132e10d0dfad2e3d82e18a1765e6.png)
【综合运用】如图3,在平面直角坐标系中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38b73e6777246f78353fc101dd1bc619.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81e1402fb671b426875a5af5e0cd467b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a5032c324d66b4b38fa7f05013f205.png)
您最近一年使用:0次
2019-04-10更新
|
811次组卷
|
8卷引用:安徽省六安市金寨县天堂寨中心学校2022 -2023学年八年级上学期数学第一次月考数学试题