1 . 我们定义:有一组邻角相等的凸四边形叫做“等邻角四边形”.例如:如图①,
,则四边形
为“等邻角四边形”.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/6f0aea1e-c90c-4c4c-b331-a605117975fd.png?resizew=392)
(1)定义理解:以下平面图形中,是等邻角四边形的是___________.
①平行四边形;②矩形;③菱形;④等腰梯形.
(2)深入探究:
①已知四边形
为“等邻角四边形”,且
,则
________.
②如图②,在五边形
中,
,对角线
平分
,求证:四边形
为等邻角四边形.
(3)拓展应用:如图③,在等邻角四边形
中,
,点P为边BC上的一动点,过点P作
,垂足分别为M,N.在点P的运动过程中,
的值是否会发生变化?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/6f0aea1e-c90c-4c4c-b331-a605117975fd.png?resizew=392)
(1)定义理解:以下平面图形中,是等邻角四边形的是___________.
①平行四边形;②矩形;③菱形;④等腰梯形.
(2)深入探究:
①已知四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4d5fadd2ebc7e17de11d4315df4fef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7960538cb70fcf641b94864a90190d.png)
②如图②,在五边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
(3)拓展应用:如图③,在等邻角四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7694a9aa674cab2722555ba856081419.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bb1548ddc0e5536a35b1bd78c4e7cd.png)
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2卷引用:2022年江西省赣州市寻乌县九年级下学期中考第二次模拟数学试题
2 . 【问题呈现】某学校的数学社团成员在学习时遇到这样一个题目:
如图1,在
中,
,AD平分
交BC于点D,点E在DC的延长线上,过E作
交AC的延长线于点F,当
时,试说明:
;
【方法探究】
社团成员在研究探讨后,提出了下面的思路:
在图1中,延长线段AD,交线段EF的延长线于点M,可以用AAS证明![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
,从而得到
…,
(1)请接着完成剩下的说理过程:
【方法运用】
(2)在图1中,若
,则线段AF、EF、AB之间的数量关系为______(用含k的式子表示,不需要证明);
(3)如图2,若
,
,
,
,求出BD的长;
【拓展提升】
(4)如图3,若
,连接AE,已知
,
,
,且
,则边EF的长=______.
如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb980da8e86b4cfd322616dc84fc6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c197d8b99f2eb7477947e53461b5d548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967d93b6a912ff75cd4b47eb8b68a6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104b98175ec7fd6958b0d9db91077fc4.png)
【方法探究】
社团成员在研究探讨后,提出了下面的思路:
在图1中,延长线段AD,交线段EF的延长线于点M,可以用AAS证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61543a63c309c18fd52aa7ac6d6188d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e532d61573265aa07696c2add38333e.png)
(1)请接着完成剩下的说理过程:
【方法运用】
(2)在图1中,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8c3d238bca387baf98ed3a556d7d0b.png)
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e0c5cb53fd85b7a23f0580df6bb49a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a028fd5b281ef168702a803baca6e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21fe7f306533f388843ff62fa2b5251a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662a9a633cdf3c5f19105025d69fc089.png)
【拓展提升】
(4)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9baa6cd7ac4ef4b87eba7fd7b86b7b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/496063320c49ad6d236b3b71494ed90b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/349bbccb3b443ace1ddbdcaf981f0536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a619ddd138a4329d3b58a59e98d7d6.png)
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968651656527872/2973769745727488/STEM/8220b3ef-a63f-486a-95ee-72008bb29213.png?resizew=456)
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3卷引用:2023年江西省赣州市石城县中考一模数学试卷
名校
解题方法
3 . 【问题情境】
如图1,四边形ABCD是正方形,M是BC边上的一点,E是CD边的中点,AE平分∠DAM.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/5/a8fe5f01-db22-4a7d-8b5d-15bf74e8dd5d.png?resizew=355)
【探究展示】
(1)直接写出AM、AD、MC三条线段的数量关系: ;
(2)AM=DE+BM是否成立?若成立,请给出证明;若不成立,请说明理由.
【拓展延伸】
(3)若四边形ABCD是长与宽不相等的矩形,其他条件不变,如图2,探究展示(1)、(2)中的结论是否成立?请分别作出判断,不需要证明.
如图1,四边形ABCD是正方形,M是BC边上的一点,E是CD边的中点,AE平分∠DAM.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/5/a8fe5f01-db22-4a7d-8b5d-15bf74e8dd5d.png?resizew=355)
【探究展示】
(1)直接写出AM、AD、MC三条线段的数量关系: ;
(2)AM=DE+BM是否成立?若成立,请给出证明;若不成立,请说明理由.
【拓展延伸】
(3)若四边形ABCD是长与宽不相等的矩形,其他条件不变,如图2,探究展示(1)、(2)中的结论是否成立?请分别作出判断,不需要证明.
您最近一年使用:0次
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134次组卷
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19卷引用:2015届江西省崇仁一中九年级上学期入学考试数学试卷
2015届江西省崇仁一中九年级上学期入学考试数学试卷2016-2017学年江西省宜春市丰城市八年级下学期期中考试数学试卷2015-2016学年江苏省江阴市长泾片八年级下学期第一次月考数学试卷2015-2016学年江苏省徐州市铜山区八年级下期中数学试卷2016-2017学年江苏省扬州市江都区5校联谊八年级下学期第一次月考数学试卷江苏省扬州市江都区邵樊片2016-2017学年八年级下学期第一次月考数学试题江苏省仪征市第三中学2017-2018学年八年级下学期第一次月练数学试题山东省德州市六校2017-2018学年八年级下学期第二次月考数学试题【全国市级联考】安徽省合肥市2017-2018学年度八年级下学期期末模拟测试数学试卷(三)北师大数学九年级上册 第1章 特殊平行四边形 单元质量评估重庆实验学校-2018-2019学年八年级第一学期期中数学试题江苏省泗阳县实验初级中学2018-2019学年八年级下学期期中考试数学试题山东省泰安市新泰市2018-2019学年八年级下学期期中数学试题陕西省商洛市商州区2018-2019学年八年级下学期期中数学试题广东省茂名市高州市第一中学2021-2022学年九年级上学期9月月考数学试题广东省揭阳市五校2021-2022学年九年级上学期第一次月考数学试题重庆市綦江区通惠中学2020-2021学年八年级下学期第二次定时作业数学试题山西省忻州市第七中学校北校区2022-2023学年八年级下学期期中数学试题(已下线)专题01 特殊四边形的性质与判定(十大题型)-【好题汇编】备战2023-2024学年九年级数学上学期期中真题分类汇编(北师大版)
真题
名校
4 . 某校一数学兴趣小组在一次合作探究活动中,将两块大小不同的等腰直角三角形
和等腰直角三角形
,按如图1的方式摆放,
,随后保持
不动,将
绕点C按逆时针方向旋转
(
),连接
,
,延长
交
于点F,连接
.该数学兴趣小组进行如下探究,请你帮忙解答:
时,则
_____;
(2)【初步探究】如图3,当点E,F重合时,请直接写出
,
,
之间的数量关系:_________;
(3)【深入探究】如图4,当点E,F不重合时,(2)中的结论是否仍然成立?若成立,请给出推理过程;若不成立,请说明理由.
(4)【拓展延伸】如图5,在
与
中,
,若
,
(m为常数).保持
不动,将
绕点C按逆时针方向旋转
(
),连接
,
,延长
交
于点F,连接
,如图6.试探究
,
,
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/10fc7991ea17d54ff5f4445ac5699463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a78f1b109b3c6d2390f0afb8e2513d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708d48b595c17d4dccf9b4086d7e664e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14dbafa1565aa5fb728b1b6edc1f8a93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9251dff989f7d60db751b73033dee269.png)
(2)【初步探究】如图3,当点E,F重合时,请直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(3)【深入探究】如图4,当点E,F不重合时,(2)中的结论是否仍然成立?若成立,请给出推理过程;若不成立,请说明理由.
(4)【拓展延伸】如图5,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc75953bf5dcfa4af308c34bf9952d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76bf6a1ddc40eca17f3d5ce18c00bacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1fd7458509752c375bb49bc58278481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708d48b595c17d4dccf9b4086d7e664e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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20卷引用:江西省抚州市金溪县第一中学2022-2023学年九年级上学期第三次月考数学试题
江西省抚州市金溪县第一中学2022-2023学年九年级上学期第三次月考数学试题江西省 抚州市 临川区江西省抚州市第一中学2023-2024年九年级上学期第二次月考数学试题2022年四川省达州市中考数学真题(已下线)专题17 图形变换(平移、旋转、对称)-2022年中考数学真题分项汇编(全国通用)(第1期)(已下线)专题09 图形的平移、对称、旋转与相似-2022年中考数学真题分项汇编 (四川专用)(已下线)专题14 相似三角形与全等三角形-三年(2020-2022)中考数学真题分项汇编(四川专用)(已下线)2022年四川省广元市中考数学变式题22-26(已下线)2022年四川省乐山市中考数学真题变式汇编22-26(已下线)专题4.54 《图形的相似》挑战综合(压轴)题分类专题(专项练习)-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)第30课 相似三角形(动态几何,坐标问题)-2022-2023学年九年级数学上册课后培优分级练(北师大版)四川省达州市开江县永兴中学2022-2023学年九年级上学期11月月考数学试题(已下线)2022年四川省达州市中考数学真题变式题21-25题(已下线)专题27.49 《相似》挑战综合(压轴)题分类专题(专项练习)-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6.52 《图形的相似》挑战综合(压轴)题分类专题(专项练习)-2022-2023学年九年级数学下册基础知识专项讲练(苏科版)(已下线)第五节 图形的旋转与位似03综合测(已下线)黄金卷08(青岛专用)-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(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)2023年甘肃省平凉市初中毕业与高中招生数学模拟预测试题2024年山东省济南市天桥区九年级下学期中考一模数学模拟试题2024年山东省菏泽市鲁西新区中考三模数学试题
5 . 在
中,
,
,点
是
的中点,点
是射线
上的一个动点(点
不与点
、
、
重合),过点
作
于点
,过点
作
于点
,连接
,
.
【问题探究】如图1,当
点在线段
上运动时,延长
交
于点
,
![](https://img.xkw.com/dksih/QBM/2021/1/26/2644499781558272/2653410857607168/STEM/6eb0852b-d74e-4448-a1d2-0a312d30706b.png)
(1)求证:
≌
;
(2)
与
的数量关系为:______(直接写结论,不需说明理由);
【拓展延伸】
(3)①如图2,当
点在线段
上运动,
的延长线与
的延长线交于点
,
的大小是否变化?若不变,求出
的度数;若变化,请说明理由;
②当
点在射线
上运动时,若
,
,直接写出
的面积,不需证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10d461a7c0b86a2f09c2ea17f38260e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/e4398a409532d9a2a7504f91c5be1b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d551b53d8b6d675267f4d1cfad476855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
【问题探究】如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc93e193fad261689949a52819753f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/2021/1/26/2644499781558272/2653410857607168/STEM/6eb0852b-d74e-4448-a1d2-0a312d30706b.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80651f797ab9dccfd7163c605b091ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23686d37eb89fb4c6b6649fb76f02b8f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
【拓展延伸】
(3)①如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f8bd15abf37c18dfaecf354b4103bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f8bd15abf37c18dfaecf354b4103bf.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8832c5450a61500ccbf73d95e16f449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc869125145c0139d92490a41bd3918.png)
您最近一年使用:0次
2021-02-08更新
|
961次组卷
|
6卷引用:江西省宜春市2020-2021学年八年级上学期期末数学试题
江西省宜春市2020-2021学年八年级上学期期末数学试题江西省新余市第三中学2022-2023学年八年级上学期课后服务第二次质量检测数学试卷 江西省南昌第五中学实验学校2023-2024学年八年级上学期月考数学试题江苏省扬州市扬州中学教育集团树人学校2021-2022学年八年级上学期10月月考数学试题江苏省无锡市羊尖中学2022-2023学年八年级上学期10月月考数学试题(已下线)第2章 轴对称图形(基础、典型、易错、压轴)分类专项训练-2022-2023学年八年级数学上学期考试满分全攻略(苏科版)
6 . 【问题背景】在学习了等腰三角形等有关知识后,数学活动小组对如图所示的课本上的一道例题进行了深入探究,发现:当角平分线遇上平行线时一般可得等腰三角形,有角平分线时,常过角平分线上一点作角的平行线构造等腰三角形.如图1,P为∠AOB的角平分线OC上一点,过点P作PD∥OB交OA于点D,易证△POD为等腰三角形.
【基本运用】(1)如图2,把长方形纸片ABCD沿对角线AC折叠,点B落在点B'处,重合部分△ACE是等腰三角形吗?为什么?
【类比探究】(2)如图3,△ABC中,∠ABC的角平分线BO与外角∠ACG的角平分线交于点O,过点O作OD//BC分别交AB、AC于点D、点E,试探究线段BD、DE、CE之间的数量关系并说明理由;
【拓展提升】(3)如图4,四边形ABCD中,AD∥BC,E为CD边的中点,且AE平分∠BAD,连接BE,求证:AE⊥BE.
【基本运用】(1)如图2,把长方形纸片ABCD沿对角线AC折叠,点B落在点B'处,重合部分△ACE是等腰三角形吗?为什么?
【类比探究】(2)如图3,△ABC中,∠ABC的角平分线BO与外角∠ACG的角平分线交于点O,过点O作OD//BC分别交AB、AC于点D、点E,试探究线段BD、DE、CE之间的数量关系并说明理由;
【拓展提升】(3)如图4,四边形ABCD中,AD∥BC,E为CD边的中点,且AE平分∠BAD,连接BE,求证:AE⊥BE.
![](https://img.xkw.com/dksih/QBM/2021/12/9/2868884454244352/2869335746977792/STEM/250f63b6-3db3-416f-ae12-4b75fc4ae9bf.png?resizew=610)
您最近一年使用:0次
2021-12-10更新
|
269次组卷
|
3卷引用:江西省宜春市高安市2021-2022学年八年级上学期期中数学试题
解题方法
7 . (1)观察图形:如图1,
中,
,
,
,
,垂足分别为
、
,
与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/9a3c91a3-bddd-400f-bd99-cb32a8edff7b.png?resizew=374)
①线段
与线段
的数量关系是______;
②写出图1中所有的全等三角形______;
(2)问题探究:如图2,
中,
,
,
平分
,
,垂足为
,
与
交于点
.试探究
和
的数量关系,并证明.
(3)拓展延伸:
如图3,
中,
,
,点
在
上,
,
,垂足为
,
与
交于点
.若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f81e24376a13d648c2ed0dc73bc710e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/9a3c91a3-bddd-400f-bd99-cb32a8edff7b.png?resizew=374)
①线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
②写出图1中所有的全等三角形______;
(2)问题探究:如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f81e24376a13d648c2ed0dc73bc710e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(3)拓展延伸:
如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f81e24376a13d648c2ed0dc73bc710e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbaec9cc53032210714b95af502c7dae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878a63a7899c8226744748a0102eab95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348fb71fbc47fd87e9ce011652ef4186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a79e50fbf09991f21b5a51d3e50ccd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次
真题
8 . 在Rt△ABC,∠C=90°,D为AB边上一点,点M、N分别在BC、AC边上,且DM⊥DN.作MF⊥AB于点F,NE⊥AB于点E.
![](https://img.xkw.com/dksih/QBM/2013/9/10/1573679886655488/1573679892922368/STEM/57527a2df2f34328aace783862dc533a.png)
(1)特殊验证:如图1,若AC=BC,且D为AB中点,求证:DM=DN,AE=DF;
(2)拓展探究:若AC≠BC.
①如图2,若D为AB中点,(1)中的两个结论有一个仍成立,请指出并加以证明;
②如图3,若BD=kAD,条件中“点M在BC边上”改为“点M在线段CB的延长线上”,其它条件不变,请探究AE与DF的数量关系并加以证明.
![](https://img.xkw.com/dksih/QBM/2013/9/10/1573679886655488/1573679892922368/STEM/57527a2df2f34328aace783862dc533a.png)
(1)特殊验证:如图1,若AC=BC,且D为AB中点,求证:DM=DN,AE=DF;
(2)拓展探究:若AC≠BC.
①如图2,若D为AB中点,(1)中的两个结论有一个仍成立,请指出并加以证明;
②如图3,若BD=kAD,条件中“点M在BC边上”改为“点M在线段CB的延长线上”,其它条件不变,请探究AE与DF的数量关系并加以证明.
您最近一年使用:0次
2019-01-30更新
|
493次组卷
|
5卷引用:2014届江西省朝宗实验学校九年级下学期第一次段考数学试卷
2014届江西省朝宗实验学校九年级下学期第一次段考数学试卷2013年初中毕业升学考试(福建莆田卷)数学(已下线)【万唯原创】2015年安徽省中考数学-试题研究-综合训练2(已下线)【万唯原创】2016年安徽省中考数学-试题研究-空间与图形综合训练(一)(已下线)【万唯原创】2021安徽省中考数学模拟试题(一)
9 . 综合与实践
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/0805cea0-adbd-46c2-8e34-890ff90dc3b4.png?resizew=586)
初步感知
(1)如图1,
,
交
于点E.
与
存在的数量关系为 ;
知识应用
(2)如图2,已知在
中,
,
为
的角平分线,
为
的高线,
,
相交于点O.
①如图2,若
,求证:
;
②如图3,若
,则
与
的数量关系为 ;
拓展提升
(3)如图4,在四边形
中,
,
,E,F分别为
,
上的点,且
,
与
相交于点G,连接
.若
,
,
,求
的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/0805cea0-adbd-46c2-8e34-890ff90dc3b4.png?resizew=586)
初步感知
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/276f64bcfa74b44c5ef5ca88fc8208f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35803969509655f72b4118503ae1c966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685516a27697104e83b311d76efa17aa.png)
知识应用
(2)如图2,已知在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
①如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27e47690ed332c573186992b6d25654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6e7b3d0946d17b418482aaf38c87fd.png)
②如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c029e4ab80f8a2080d59ba73841f364f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
拓展提升
(3)如图4,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbe4cdd2c154bd9a8073b0d4cecb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eccde61ad87df2340a71f3dbc8c64fd4.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/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f1d32e525c3fc3c38d22783b79836c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/201a535bbbf5bfe454c2a2c534178fd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ce84f6062f12bf6ef42d7b733cd2248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfb4b7d0f2b63accfc8df03147ba2ec5.png)
您最近一年使用:0次
名校
10 . 【课本再现】
(1)如图1,
都是等边三角形,连接
,其中与
相等的角是 .
【类比迁移】
(2)如图2,在菱形
中,
,点E,F分别在边
上,且
.
①求证:
.
②若
,点E在
边上从点B向点C运动,设
,
,求y与x的函数关系式.
【拓展运用】
(3)如图3,在四边形
中,
,
,
是
的平分线,求
的长.
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/033189a44f0e3cb6ed3164a2930d5276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a1465fd3835e3907212e120665656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
【类比迁移】
(2)如图2,在菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481e426224c3a3ce9bb5a731eed81c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9de6ef5f095183ab6dbf5ee8c11bfd35.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a893fc8b2e9d55c9cdf8aceb3827a0.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c29bf5a05dd46f6e03dfd22c32f7ce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8336a1e451ac405333cf72c5a1a5e283.png)
【拓展运用】
(3)如图3,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8b709a173120436dac669c74b927d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aafc4415bb93cb9e92697ca4d0bb990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/e584af0f-2de6-4ff2-a63c-bf89b4403a21.png?resizew=524)
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