名校
1 . 【感知】如图①,在
中,点
为边
延长线上的点,若
,过点
作
交
延长线于点
.若
,求
的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/c5d6d3b1-a9c8-4938-abea-2bbe689caad8.png?resizew=499)
【探究】如图②,在
中,点
是边
上的点,点
为边
的中点,连接
、
交于点
,若
,小明尝试探究
的值.在图②中.小明过点
作
交
于点
,易证
,则
,从而得到
的值为___________,易证
,则
,从而得到
的值为___________.从而得到
的值为___________.
【应用】如图③,在
中,点
是边
上的点,
为边
延长线上的点,连接
,延长
,交
于点
.若
,
,且
的面积为1,则
的面积为___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82c30e506a480088d2da077839b03bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f341b98caabf99bc683ce8407068735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/c5d6d3b1-a9c8-4938-abea-2bbe689caad8.png?resizew=499)
【探究】如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.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/ccc6ce7c110ad2a876487e143042e2d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c593ba4e7d7e89e66a926591022adcb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78d3117afa76bd0d1cb69d2d3ec1450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa99ecfe06f48acfc78258eb4d6258b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02cb743146c4f3cfe362b5b369c2ff51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d0065d620aaf8742c7928574b81913a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c7d52fede4b202d9092d208739cdfae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858f731a170fa7f794edf25b6b9bde75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb9d79cc1792a9ba646459155877f4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c593ba4e7d7e89e66a926591022adcb1.png)
【应用】如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46a13f1e739c3eb6cbc461c8053ddff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a72599cfdfa9cd0a491b831100a2ede.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e64c953aaf341e772a5fe776fbc78a.png)
您最近一年使用:0次
2023-02-08更新
|
98次组卷
|
2卷引用:广东省惠州市博罗县龙溪中学2022-2023学年九年级下学期开学考试数学试卷
2 . 如图1,在平面直角坐标系中,已知点
在x轴的负半轴,点
在x轴的正半轴,
,将
绕C点顺时针方向旋转
到
,将
绕C点逆时针方向旋转
到
,连
交y轴于F.
(1)当
时,直接写出D点的坐标为__________.
(2)当m变化时,请你探究:
①F点的坐标是否变化?若变化,请用m表示F点的坐标,如果不变,求出F点的坐标;
②
是否变化?若变化,请用m表示;如果不变,求出
.请你直接写出结果:__________.
(3)如图2,过A点作
,且
,直线
交y轴于M,探求M点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6106aa6c72e130735e8d66ac54f644a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/096e9979084e79a43ecce481db65d5db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62dfe60e2f098c466a048b982151365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/19/a40cd49f-0a24-47a0-bb83-754cb7c91780.png?resizew=340)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
(2)当m变化时,请你探究:
①F点的坐标是否变化?若变化,请用m表示F点的坐标,如果不变,求出F点的坐标;
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25fde46381b6e7585b886c6cc8a16d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25fde46381b6e7585b886c6cc8a16d94.png)
(3)如图2,过A点作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe3865df6e6ec4d3bf6bc66079e02c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39bd02adad393a75a984e6a19bd5c6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
您最近一年使用:0次
名校
3 . 下表是小明进行数学学科项目化学习时候的记录表,填写活动报告的部分内容.
项目主题:测量河流的宽度.
项目探究:河流宽度不能直接测量,需要借助一些工具,比如:小镜子,标杆,皮尺,自制的直角三角形模板…,各组确定方案后,选择测量工具,画出测量示意图,并进行实地测量,得到具体数据,从而计算出河流的宽度.
项目成果:下面是小明进行交流展示的部分测量方案及测量数据:
题目 | 测量河流宽度 |
目标示意图 | |
测量数据 |
请你参与这个项目学习,并完成下列任务
(1)任务一:请你借助小明的测量数据,计算河流的宽度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)任务二:请你写出这个方案中求河流的宽度时用的数学知识______(定出一条即可);
(3)任务三:请你再设计一个与小明不同的测量方案,并画图简要说明一下。
您最近一年使用:0次
2023-12-06更新
|
210次组卷
|
4卷引用:福建省福州第一中学2023-2024学年九年级下学期开学考试数学试题
4 . 在与圆有关的比例线段探究学习中,某兴趣小组发现有三种不同情况,并完成了情况一的证明.请你选择情况二或者情况三中的一种情况进行证明.
为
上的点,直线
相交于点
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2740d2f1f18082f6299bd23e0be289c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b79c80cc81b5446dfac3ee97b03c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
证明 | ||
情况一点P在⊙O内时,连接![]() ![]() ![]() ∴ ![]() ∴ ![]() ![]() | 情况二点P在⊙O外时(如图2): | 情况三当点A和点B重合时(如图3) |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/aee20b06-72e3-47c1-ba9c-ef573bbe362d.png?resizew=550)
您最近一年使用:0次
名校
5 . 根据以下素材,探索完成任务.
运用二次函数来研究植物幼苗叶片的生长状况 | ||
素 材 | 在大自然里,有很多数学的奥秘.一片美丽的心形叶片、一棵生长的幼苗都可以看作把一条抛物线的一部分沿直线折叠而形成. | |
问题解决 | ||
任 务 1 | 确定心形叶片的形状 | 如图3建立平面直角坐标系,心形叶片下部轮廓线可以看作是二次函数![]() |
任 务 2 | 研究心形叶片的尺寸 | 如图3,心形叶片的对称轴直线![]() ![]() ![]() ![]() ![]() ![]() ![]() |
任 务 3 | 探究幼苗叶片的生长 | 小李同学在观察幼苗生长的过程中,发现幼苗叶片下方轮廓线都可以看作是二次函数![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-05-04更新
|
1046次组卷
|
11卷引用:广东省深圳市南山区南山外国语学校(集团)2023-2024学年九年级下学期开学考数学试题
广东省深圳市南山区南山外国语学校(集团)2023-2024学年九年级下学期开学考数学试题2023年浙江省永康市中考一模数学试题2023年江苏省苏州市胥江实验中学校中考二模数学试题陕西省西安市高新二中2023-2024学年九年级上学期期末数学试题2023年浙江省温州市育英国际实验学校娄桥校区中考模拟数学模拟预测题2023年贵州省贵阳市观山湖区中考模拟数学模拟预测题2023年贵州省铜仁市第五中学中考数学四模模拟预测题2023年浙江省温州市瓯海区育英国际实验学校娄桥校区中考数学模拟预测试题(已下线)重难点01 二次函数与几何的综合训练(9大题型+限时分层检测)-2024年中考数学【热点·重点·难点】专练(全国通用)2023学年贵州省铜仁市第五中学九年级下学期第四次模拟数学模拟预测题2024年广东省深圳市南山区桃源中学中考三模数学试题
6 . 如图,
个边长为2的等边三角形有一条边在同一直线上,且这些等边三角形的第三个顶点位于该直线的同一侧.设
的面积为
,
的面积为
,…,
的面积为
,请探究并解决下列问题:
(1)等边三角形
的面积等于______ .
(2)
等于______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aceb113626093e0e431f30fa45c2c444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14d6cbf01ed870324b157f53103c907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8abb26d62874132ac69b552dd8cda7b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c48b334accb5544e2c3403f738f8d543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/2/8f4dfb7c-7ccb-4d60-b19e-62fd19bc23bb.png?resizew=373)
(1)等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05201ef79a5d5904f492845396fb5470.png)
您最近一年使用:0次
2023·四川巴中·中考真题
真题
解题方法
7 . 综合与实践.
和
中,
,且
,
,连接
,连接
交
的延长线于点O.
①
的度数是___________.
②
__________.
(2)类比探究.如图2,在
和
中,
,且
,连接
并延长交于点O.
①
的度数是___________.
②
___________.
(3)问题解决.如图3,在等边
中,
于点D,点E在线段
上(不与A重合),以
为边在
的左侧构造等边
,将
绕着点A在平面内顺时针旋转任意角度.如图4,M为
的中点,N为
的中点.
①试说明
为等腰三角形.
②求
的度数.
![](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/26813466e2ee49a493881a4384fc8748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a1ce777c38d86186c0ea5dd42b6672d.png)
(2)类比探究.如图2,在
![](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/f0a9bba638aa5db4131836328aac46e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c50ed3533d5274047cac354bf4e1fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15204b24dd62067316fee9abab2bf73.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a984d57770ddb0ac29599901f8cc26.png)
(3)问题解决.如图3,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
①试说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d303c32af8831735d4e0f86fa45874.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18104b46692bd03c473fa81c38e49ca4.png)
您最近一年使用:0次
2023-06-16更新
|
1036次组卷
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16卷引用:山东省菏泽市成武县育青中学2023-2024学年九年级上学期分班考试数学试题
山东省菏泽市成武县育青中学2023-2024学年九年级上学期分班考试数学试题(已下线)2023年四川省巴中市中考数学真题(已下线)专题19 图形的相似(含位似)-学易金卷:2023年中考数学真题分项汇编(四川专用)(已下线)专题22 几何压轴题-学易金卷:2023年中考数学真题分项汇编(四川专用)(已下线)专题13 三角形基础、全等三角形、等腰三角形和直角三角形-学易金卷:2023年中考数学真题分项汇编(四川专用)(已下线)专题15 多边形与平行四边形-学易金卷:2023年中考数学真题分项汇编(四川专用)(已下线)专题31图形的旋转(优选真题60道)-学易金卷:三年(2021-2023)中考数学真题分项汇编【全国通用】(已下线)2023年四川省成都市中考数学真题变式题24-26题广东省深圳市南山区桃源中学2023-2024学年九年级上学期期中数学试题广东省深圳市南山区南山外国语学校集团2023-2024学年九年级上学期期中数学试题(已下线)专题23 几何综合-学易金卷:三年(2021-2023)中考数学真题分项汇编(四川专用)(已下线)第5讲 探究题辽宁省沈阳市大东区2023-2024学年九年级上学期10月月考数学试题江苏省兴化市昭阳湖初级中学2023-2024学年九年级下学期月考数学试题2024年甘肃省天水市甘谷县部分学校九年级下学期一模数学模拟试题(已下线)培优冲刺01 三角形中的常见模型综合训练(14模型)-【查漏补缺】2024年中考数学复习冲刺过关(全国通用)
名校
8 . 阅读下面活动内容,完成探究1-3的问题:将一个矩形
绕点A顺时针旋转α
,得到矩形
,连结
.
[探究1]如图1,当
时,点
恰好在
延长线上.若
,求
的长.
[探究2]如图2,连结
,过点
作
交
于点M,线段
与
相等吗?请说明理由.
[探究3]在探究2的条件下,射线
分别交
,
于点P,N(如图3),发现线段
存在一定的数量关系,请写出这个关系式,并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48d373bc225f461dc681e1623a40fe98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f669bdadebe4849e29e9bd3b2efe2ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/1/3fc7958b-3453-44c1-aaf5-133cdea9853f.png?resizew=575)
[探究1]如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e210795a966bd5dc1293479ab1988b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
[探究2]如图2,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c962456e190ea0d7e6e88782aa8c161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4171e7f713d6b265d56b2662b7af57b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cc72b34573c6bca05b73e81c34f44d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab71234837e6b78b80519c696662a198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
[探究3]在探究2的条件下,射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71bb0944a7fd72c026500ac8e8d4d1ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c962456e190ea0d7e6e88782aa8c161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef5f0258a1c609e2cbb312a74bcc8ad.png)
您最近一年使用:0次
2023-05-30更新
|
155次组卷
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6卷引用:广东省惠州市博罗县龙溪中学2022-2023学年九年级下学期开学考试数学试卷
9 . 如图(1),等腰三角形
中,
,
.点
,
分别在
,
上,
.
(1)操作发现:将图(1)中的
绕点
逆时针旋转,当点
落在
边上时,
交
于点
,如图(2).发现:
.请证明这个结论.
(2)实践探究:将图(1)中的
绕点
顺时针旋转(
),当
,
,
三点在同一条直线上时,连接
,如图(3).请解答以下问题:
①求证:
;
②探究线段
,
,
之间的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e4f0c1c9cca0555906d8a53e1a6803d.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/19/9b4efbe2-8aaa-4e1f-98f6-2c7e6b4975e0.png?resizew=459)
(1)操作发现:将图(1)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69f4c2149adbec537589f90a9aa13cc9.png)
(2)实践探究:将图(1)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d45907c3ea211a810bbf941a0bd0e6f.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/042f70a42a763456adf8d758ea5ca276.png)
②探究线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
10 . 已知正方形
,在
和
边上各有一点E,F,且
,连接
,分别取
的中点M,N,连接
.
(1)如图1,连接
.
①求证:
.
②求
的度数.
(2)如图2,将
绕点C旋转,当
在正方形
外部时,连接
,试探究
与
的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/ac679f877d3e3b3acef1f1f8e3654b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334567e874e3dc55f4d698bba5b3d010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334567e874e3dc55f4d698bba5b3d010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e7477bdf46322a0dc0ed9027792376.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/24/16bbbade-b289-4654-ae50-15674cf31a8b.jpg?resizew=332)
(1)如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38d97f03faed3152db2fd3bd1919944.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbe9b60364e489347f264cc3d8c30e8.png)
(2)如图2,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2023-06-14更新
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124次组卷
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2卷引用:福建省莆田市城厢区南门学校2023-2024学年九年级上学期开学考试数学试题