1 . 问题情境:如图1,在矩形
中,
.E为边
上一点,沿直线
将矩形折叠,使点C落在
边的点
处.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/e83f18ab-ff11-4257-be60-770e4c77cc82.png?resizew=430)
猜想验证:
(1)填空:
的长为 ___________.
(2)如图2,将
沿线段
向右平移,使点
与点B重合,得到
,
与
交于点F,
与
交于点G.
①求
的长;
②连接
,则四边形
是平行四边形吗?若是,予以证明;若不是,请说明理由.
拓展研究:
(3)如图3,将
沿点B按逆时针方向旋转一定角度α(
),
分别交
和
于点M和点N.当
时,分别求出
的值和线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab7691fe3c65dfed679efb5a2dd5e756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/e83f18ab-ff11-4257-be60-770e4c77cc82.png?resizew=430)
猜想验证:
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
(2)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99fbe87b1253e909fea69ab2192fbe94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ab0d4fc7d64bd12d32f21ab220ef55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cece895cbddf9d1f37f75e3b6346edda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8b40d14544a9be0bebdb276f0fa865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9dc271bc55a105a6b98d4fe204fdcb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4706c459425a95385fa7ae514fec1f3d.png)
拓展研究:
(3)如图3,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ab0d4fc7d64bd12d32f21ab220ef55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708d48b595c17d4dccf9b4086d7e664e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f611f5bb08a66cae8fe411e59a1c08e.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/ec6dbd83a8f075793c97ca25333adab3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2023-03-01更新
|
139次组卷
|
3卷引用:江西省抚州市东乡区2022-2023学年九年级下学期期中数学试题
江西省抚州市东乡区2022-2023学年九年级下学期期中数学试题2022年广东省佛山市南海市桂城街道桂江第二初级中学九年级数学中考复习第一次模拟测试题(已下线)黄金卷04(德州专用)-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷
2 . 课本再现
,
)按如图1所示的方式摆放(图中所有的点、线都在同一平面内),则与
相似的三角形有 .(填序号)
①
;②
;③
.
类比迁移
(2)将两个等腰直角三角形(
)按如图2所示的方式摆放,点D在边
上.
①求证:
.
②如图3,若D是
的中点,
与
交于点G,
与
交于点H,
,连接
,求
的长.
拓展应用
(3)如图4,在
中,
,点D,E分别在边
上,且
,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b8fcf051cb34a38517542b75aae780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad09a769a75b107390b9eeccc929f761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf94bbdc11e2942b20368833c7d7a787.png)
类比迁移
(2)将两个等腰直角三角形(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f870c701b4c8313396f1cf23623b1586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c131f08f584897a3cdbacf4c0b1e49.png)
②如图3,若D是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6578f114d26a4b74f0cabd8d74c2129.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
拓展应用
(3)如图4,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cca04b2a2b61d62a809776670a60c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15257d22e01a3bf10a655eb3648c5dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6834ac70927ae08d7d36a1922403c9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adaead91b4b6febfcdd6f995d81e550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
3 . 如图,将
绕点
逆时针旋转
后,
与
构成位似图形,我们称
与
互为“旋转位似图形”.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/cc9872aa-b809-42cc-900d-952ce3fc3f94.png?resizew=535)
(1)知识理解:两个重合了一个顶点且边长不相等的等边三角形 (填“是”或“不是”
“旋转位似图形”;
如图1,
与
互为“旋转位似图形”,
①若
,
,
,则
;
②若
,
,
,则
;
(2)知识运用:
如图2,在四边形
中,
,
于
,
,求证:
和
互为“旋转位似图形”;
(3)拓展提高:
如图3,
为等腰直角三角形,点
为
中点,点
是
上一点,
是
延长线上一点,点
在线段
上,且
与
互为“旋转位似图形”,若
,
,求出
和
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/cc9872aa-b809-42cc-900d-952ce3fc3f94.png?resizew=535)
(1)知识理解:两个重合了一个顶点且边长不相等的等边三角形 (填“是”或“不是”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82271067fdfa13bad08b808e2f8a2a42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a32af9c7baa934baaebbbc0562cf7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a00f2502ca114d4c263d7028f5e40e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4af17b55fa474f0103a858c2604b093.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb388a36bd5caaa51b7e3c898e3c906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
(2)知识运用:
如图2,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c51c25b65a37b676ae3c3b71c29f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74e7ed62a6b2a0ea9eee7513c16130e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
(3)拓展提高:
如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbf5459b20ca890a47ebf8d51d90cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c3ec174b1ce835cc8737ff6ce57e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
2023-01-12更新
|
162次组卷
|
8卷引用:【全国市级联考】江西省景德镇市2018届九年级第二次质检数学试题
【全国市级联考】江西省景德镇市2018届九年级第二次质检数学试题江苏省扬州市梅岭中学教育集团2021-2022学年九年级上学期期末数学试题(已下线)第6章 图形的相似(基础、典型、易错、压轴)分类专项训练-2022-2023学年九年级数学考试满分全攻略(苏科版)(已下线)重难点01 相似三角形(6种解题模型)-2022-2023学年九年级数学考试满分全攻略(苏科版)(已下线)专题12 手拉手模型证相似-【微专题】2022-2023学年九年级数学下册常考点微专题提分精练(人教版)(已下线)专题17 手拉手旋转模型证相似-【微专题】2022-2023学年九年级数学下册常考点微专题提分精练(苏科版)河南省南阳市宛城区第一完全学校2022-2023学年九年级上学期期末数学试题(已下线)2023年河南省洛阳市偃师市中考数学一模试题变式题21-23题
4 . 课本再现
(1)在学习“图形的平移和旋转”时,有这样一道题:如图1,点D在等边
的边
上,将
绕点A旋转,点B的对应点为点C,小明是这样做的:过等边
的顶点C作
的平行线l,在l上截取
,连接
,则
即为
绕点A旋转后的图形,则
______;
(2)如图2,点D为等边
的边
下方一点,连接
,若
,
,求
面积的最小值;
(3)如图3,在四边形
中,
,点E在
上,且
,
于点E,交
于点O,求
的值.
(1)在学习“图形的平移和旋转”时,有这样一道题:如图1,点D在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa80cfd38f59e5cbbb30628d03113689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb49df05f2e31d005735c3f14a21d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e910dce5a57ff0d917e0b4dd620214.png)
(2)如图2,点D为等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc1a80f3d9daaba119b22cdc0183967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/139298d31c1903599dea9a73147c0bba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966fe10f6b1a8626c4751b4f7785b754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a63084f1478a46a2ef6ccb2f3c411c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b3d21b89f1eec4b03641467faff038.png)
您最近一年使用:0次
11-12八年级上·江苏无锡·期中
名校
5 . 数学课上,李老师出示了如下的题目.
在等边三角形
中,点
在
上,点
在
的延长线上,且
,如图.试确定线段
与
的大小关系,并说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/bf1f447f-d767-4af9-986a-c1b522c86826.png?resizew=218)
小敏与同桌小聪讨论后,进行了如下解答:
(1)特殊情况,探索结论.
当点
为
的中点时,如图
,确定线段
与的
大小关系.请你直接写出结论:
____
(填“
”,“
”或“
”).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/3c504148-b615-4197-8adc-006316c0db46.png?resizew=216)
(2)特例启发,解答题目.
解:题目中,
与
的大小关系是:
________
(填“
”,“
”或“
”).理由如下:
如图
,过点
作
,交
于点
.(请你完成以下解答过程)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/7986410a-7b8e-4902-a5da-52a210aa92d9.png?resizew=197)
(3)拓展结论,设计新题.
在等边三角形
中,点
在直线
上,点
在直线
上,且
.若
的边长为
,
,求
的长(请你直接写出结果).
在等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f9a3935cd124d021c7b18b0f634915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/bf1f447f-d767-4af9-986a-c1b522c86826.png?resizew=218)
小敏与同桌小聪讨论后,进行了如下解答:
(1)特殊情况,探索结论.
当点
![](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/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/3c504148-b615-4197-8adc-006316c0db46.png?resizew=216)
(2)特例启发,解答题目.
解:题目中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee73452ee4d5437f1399f1235b95e55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/7986410a-7b8e-4902-a5da-52a210aa92d9.png?resizew=197)
(3)拓展结论,设计新题.
在等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f9a3935cd124d021c7b18b0f634915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
2022-12-02更新
|
156次组卷
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50卷引用:江西省赣州市宁都县2019-2020学年八年级上学期期中数学试题
江西省赣州市宁都县2019-2020学年八年级上学期期中数学试题江西省赣州市宁都县实验班2019-2020学年八年级上学期期末数学试题江西省赣州市寻乌县2018-2019学年八年级上学期期末数学试题江西省寻乌县澄江中学2018-2019学年八年级上学期期末数学试题(已下线)【南昌新东方】2020年7月九江同文中学初二下期末考试 13江西省抚州市第一中学2022-2023学年八年级下学期月考数学试题(已下线)2011年江苏省江阴市青阳二中八年级上学期期中考试数学卷(已下线)2011-2012年江苏省南通市幸福中学八年级上学期期中考试数学卷(已下线)浙江省衢州市实验学校2011-2012学年八年级上学期期末考试数学卷(已下线)2011-2012学年浙江省台州市八校八年级上学期期中联考数学试卷(已下线)2011-2012学年浙江慈溪市四校八年级下学期期中联考数学卷2012-2013学年吉林镇赉镇赉镇中学九年级下第一次综合测试数学试卷2014-2015学年江苏省泰州市海陵区八年级上学期期中考试数学试卷2014-2015学年江苏省江阴市第二中学八年级上学期期中考试数学试卷2014-2015学年云南省腾冲县八年级上学期六校联考期末数学试卷2014-2015学年四川省自贡赵化中学八年级上学期第三次段考数学试卷2015-2016学年浙江省杭州四季青中学八年级上学期期中考试数学试卷江苏省扬州中学教育集团树人学校2017-2018学年八年级上学期第一次月考数学试题山东省济南市历下区2016-2017学年八年级下学期期中考试数学试卷广东省汕头市龙湖区2017-2018学年八年级上学期期末质量检测数学试题【市级联考】黑龙江省鸡西市2018-2019学年八年级(上)期末数学试卷江苏省南京市第一中学2019-2020学年八年级上学期期中数学试题河北省保定市唐县2018-2019学年八年级上学期期末数学试题北师大版八年级下第一章 三角形的证明 第一节 等腰三角形2020年江苏省宝应县九年级下学期数学一模试题北师大版2019-2020学年七年级下册第5章 生活中的轴对称单元测试(B卷提升卷)数学试题四川省渠县崇德实验学校2019-2020学年八年级下学期第一次月考数学试题(已下线)【万唯原创】2014年河北省中考数学-面对面-热点题型攻略 题型7+8(已下线)【万唯原创】2014年河南省中考数学-面对面-第二部分题型5(已下线)【万唯原创】2016年河南省中考数学-面对面河南数学-第二部分题型7江苏启东惠萍初中2020--2021学年八年级上数学调研试题浙江省嘉兴市秀洲区三校共同体2020-2021学年八年级上学期月考数学试题(一)(已下线)【万唯原创】2021年河南试题研究-第二部分题型6河北省石家庄市辛集市2021-2022学年八年级上学期期末数学试题重庆市垫江第八中学2021-2022学年八年级上学期第一次定时练习数学试题重庆市垫江县垫江第八中学校2021-2022学年八年级上学期第一次月考数学试题江苏省淮安市清江浦区淮阴中学开明分校2021-2022学年八年级上学期9月月考数学试题(已下线)八年级上学期期中【易错60题考点专练】-2022-2023学年八年级数学上学期考试满分全攻略(人教版)(已下线)13.3 等腰三角形 13.4 最短路径问题-2022-2023学年八年级数学上册课后培优分级练(人教版)(已下线)第13章 轴对称(基础、常考、易错、压轴)分类专项训练-2022-2023学年八年级数学考试满分全攻略(人教版)广东省梅州市丰顺县大龙华学校2022-2023学年九年级上学期数学9月月考数学试题广东省梅州市丰顺县东留中学2022-2023学年九年级上学期12月月考数学试题(已下线)八年级上学期期末【易错60题考点专练】-2022-2023学年八年级数学上学期考试满分全攻略(人教版)(已下线)河南省郑州市登封市告成镇初级中学2021-2022学年八年级下学期第一次月考数学试题 河北省保定市安新县2022-2023学年八年级上学期期末考试数学试题河南省郑州市登封市告成一中2022-2023学年下学期八年级第一次月考数学试卷辽宁省丹东市凤城市2022-2023学年八年级下学期期中数学试题13.3.2 等边三角形黑龙江省齐齐哈尔市五地市2023-2024学年八年级上学期期中数学试题江苏省苏州市苏州工业园区青剑湖实验中学2023-2024学年八年级上学期10月月考数学试题
6 . (1)【问题发现】
中,
,
,D为
的中点.以
为一边作正方形
.点E恰好与点A重合,则
与
的数量关系为______;
(2)【拓展研究】
在(1)的条件下,如果正方形
绕点C旋转,连接
,
,
.
与
的数量关系是否会发生变化?请仅就图②的情形给出证明;
(3)【问题解决】
当正方形
旋转到B,E,F三点共线时,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.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/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(2)【拓展研究】
在(1)的条件下,如果正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(3)【问题解决】
当正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
您最近一年使用:0次
2024-03-05更新
|
129次组卷
|
23卷引用:江西省部分学校2021-2022学年九年级下学期期中数学试题
江西省部分学校2021-2022学年九年级下学期期中数学试题河南省2017年中考数学押题试卷(二)(已下线)学科网2018年5月2018届九年级第三次模拟大联考(河南)-数学【全国区级联考】山东省济南市天桥区2018届九年级(上)期末数学试卷【校级联考】河南省南阳市淅川县2018届九年级中考二模试卷数学试题2019年河南省南阳市镇平县中考一模数学试题【区级联考】2019年山东省菏泽市牡丹区中考二模数学试题湖北省襄阳市宜城市2018-2019学年九年级上学期期末数学试题河南省南阳市唐河县2019-2020学年九年级上学期期末数学试题(已下线)专题13 击破类比、探究类综合题利器之相似知识-决胜2020年中考数学压轴题全揭秘精品(河南)(已下线)热点专题7 类比拓展探究题-2020年《三步冲刺中考·数学》之热点专题冲刺(河南专用)2019年山东省菏泽市牡丹区九年级阶段性学业水平检测(二)数学试题(已下线)【万唯原创】2018年河南省中考数学试题研究-河南试卷-河南重难题型研究解答题重难点突破题型72020年河南省开封市九年级二模数学试题山东省济南市2017-2018年天桥区九年级上学期期末卷2021年河南省三门峡市中招第一次模拟考试 九年级数学(已下线)【万唯】2021年开封市第二次模拟考试2022年山西省中考一模数学试题河南省驻马店市平舆县2020-2021学年九年级下学期期中数学试题山西省运城市平陆县2022-2023学年九年级上学期1月期末数学试题山东省济南市章丘区2023-2024学年九年级上学期12月月考数学试题山东省济南市章丘区2023-2024学年九年级上学期第三次阶段考试数学试题2024年广东省深圳市罗湖区翠园实验学校中考模拟数学试题
7 . 已知正方形
,
,
绕点A旋转.
模型建立
(1)如图,当
的一边与
相交于点
,另一边与
的延长线交于点
时,请直接写出
与
的数量关系.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/741ffbeb-759e-4dd9-aac0-5bc91a3aa4d0.png?resizew=120)
类比应用
(2)如图,当
的一边
旋转到正方形
的外部,且点
,
,
在同一条直线上时,
.猜想线段
,
,
之间的数量关系,并证明你的猜想.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/1d5cbbbd-dd6f-4be0-88f2-a435b8e0f912.png?resizew=180)
拓展延伸
(3)如图,当
的一边
旋转到正方形
的内部,且点
,
,
在同一条直线上时,若
,
,
与
交于点
.已知
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/46f6f881-b6df-40f5-9a78-d4d620f03e9a.png?resizew=136)
①求
的长;
②直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cec68a1111227d3b2aa12b291dc8216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
模型建立
(1)如图,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/741ffbeb-759e-4dd9-aac0-5bc91a3aa4d0.png?resizew=120)
类比应用
(2)如图,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8c79e38a2c0a29c602da3ba62ee6c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/1d5cbbbd-dd6f-4be0-88f2-a435b8e0f912.png?resizew=180)
拓展延伸
(3)如图,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8c79e38a2c0a29c602da3ba62ee6c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef91e94afb00f610af962cd1e357f1d3.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338c6c83ab4abc895ac36ab888a55be6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/46f6f881-b6df-40f5-9a78-d4d620f03e9a.png?resizew=136)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
②直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324e464fecd30ea2eef67e934be0f288.png)
您最近一年使用:0次
2024·江西·一模
8 . 如图1,在矩形
中,
,点
分别是
上的中点,过点
分别作
与
交于点
,连接
.
(1)以下结论中正确的序号有______;
①四边形
是矩形;②矩形
与四边形
位似;③以
为边围成的三角形不是直角三角形;
类比发现
(2)如图2,将图1中的四边形
绕着点
旋转,连接
,观察
与
之间的数量关系和位置关系,并证明你的发现;
拓展应用
(3)连接
,当
的长度最大时,
①求
的长度;
②连接
,若在
内存在一点
,使
的值最小,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f6c4821f8a281d6ce07329c3e8f43a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52041559f8fee18bfa3e2e2ac07c3bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea77ba313fcc751481ac1ca214df3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52041559f8fee18bfa3e2e2ac07c3bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/458591fa3776dee716ec1a38c9d3fbd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(1)以下结论中正确的序号有______;
①四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72d8a3dc6cb93171ee20567b5440775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72d8a3dc6cb93171ee20567b5440775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/463f8440f522fdda4a2541ba8285c1b4.png)
类比发现
(2)如图2,将图1中的四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72d8a3dc6cb93171ee20567b5440775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
拓展应用
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f7f473cf395fe65459a5cb7df93e94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fb6e81fee5674c3e26a65e58cc506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3374a94c2234c5089a2ab011448335e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3374a94c2234c5089a2ab011448335e0.png)
您最近一年使用:0次
2024-03-18更新
|
378次组卷
|
4卷引用:【数学】2024江西名校联盟考试真题卷
(已下线)【数学】2024江西名校联盟考试真题卷2024年江西省南昌市中考一模数学试题2024年济南市中考数学模拟预测题(一)(已下线)抢分秘籍11 几何图形中求线段,线段和,面积等最值问题(4题型)-备战2024年中考数学抢分秘籍(全国通用)
9 . 我们把两条中线互相垂直的三角形称为“中垂三角形”,例如图1,图2,图3中,
是
的中线,
,垂足为P.像
这样的三角形均为“中垂三角形”.设
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/c6e4d257-4cc1-46f0-92e5-46fef92dcd9c.png?resizew=133)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/ec91c45e-4a83-43f5-9e23-f2206a429733.png?resizew=211)
(1)[特例探索]
如图1,当
,
时,
______,
______;
如图2,当
,
时,
______,
______.
(2)[归纳证明]
请你观察(1)中的计算结果,猜想
,
,
三者之间的关系,用等式表示出来,并利用图3证明你发现的关系.
(3)[拓展应用]
利用(2)中的结论,解答下列问题:在边长为3的菱形
中,
为对角线
中点,
分别为线段
,
的中点,连接
并延长交于点
.
分别交
于点
,如图4所示,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193a42f63312ac6a40d6e28ee93325aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187ed13a7bd532bd39af5e5ad7493a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df81cda12d7601d58b1d9c7c180c4d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c884a45b56bc34d79273b067c1520b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/3b182c5b-78e2-4836-822d-4d0e746eef62.png?resizew=118)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/f15a7f3d-58c3-491d-93c4-300f8b96b7e0.png?resizew=138)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/c6e4d257-4cc1-46f0-92e5-46fef92dcd9c.png?resizew=133)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/ec91c45e-4a83-43f5-9e23-f2206a429733.png?resizew=211)
(1)[特例探索]
如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eedf93beec809182ff56885c77cf18a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad09921d9904335a83078262ce62a473.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58d4184f5b731327886e0586442de69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b97bb18e5ca34d22b5e827316a122a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)[归纳证明]
请你观察(1)中的计算结果,猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8cc0b4997cae4d8aec791a1d3923314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a881309775c3b6a9f4ed408838666342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/566f7614d51f0348db982a9440de8844.png)
(3)[拓展应用]
利用(2)中的结论,解答下列问题:在边长为3的菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a373959bb9026f8a09845c0b828bf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec07ca71c03f8c1d6d3a1e2efcdff02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36537f5405f1c2c35f5a03eb198724e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f3ed5ea1cf0fa8f7c6be46cd5fa057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1e478ff979f8557e0f169eaf22f154.png)
您最近一年使用:0次
2022-11-13更新
|
265次组卷
|
5卷引用:2023年江西省宜春市第八中学中考一模数学试题
2023年江西省宜春市第八中学中考一模数学试题(已下线)2023年江西一模(几何综合)2019年江苏省徐州市铜山区九年级中考二模数学试题湖南省新田县云梯学校2022-2023学年九年级上学期第二次阶段测试数学试题(已下线)2020届九年级《新题速递·数学》2月第01期(考点17)
10 . 【阅读理解】
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/30/4dcac3af-4195-4190-a8aa-197efe3507bb.png?resizew=505)
(1)如图1,点A,B,C在同一直线上,
于点A,
于点C,
,
,求证:
;
【拓展应用】
(2)如图2,在平面直角坐标系
中,点
,
,分别连接
,
,设
与x轴正半轴的夹角为
,
与x轴正半轴的夹角为
,求证:
;
【能力提升】
(3)如图3,在平面直角坐标系
中,点
,
轴于点F,设点G为x轴上的一动点,当满足
时,求OG的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/30/4dcac3af-4195-4190-a8aa-197efe3507bb.png?resizew=505)
(1)如图1,点A,B,C在同一直线上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1326e85ff750d882de9ea65c29e3d3b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6240d83351b156ab5a8c0e2a9f0e277c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17101383eb0787edaaa35adfcd20d5c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b8bee1c892473f71a723860b933e234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e7fa7a6af291b7c23d2f1f13966156.png)
【拓展应用】
(2)如图2,在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78eba6f91d97cea1dfd73bae53e7b689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6f3aec1dc12dc085258842c804e597b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23fd0b7f702a8a0736b231b634075b1f.png)
【能力提升】
(3)如图3,在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209e6314c0e22412e9661c80d250634b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf783d3172debc69f963495e5bff78d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f30538734e27326e21d245076b11ded.png)
您最近一年使用:0次