名校
1 . 如图,
中,
,
,点
为
边上一点(不与点
,
重合),连接
,将线段
绕点
逆时针旋转
得到
,连接
.下列结论:①
≌
;②四边形
的面积是
;③若
,则
;④
.其中正确的结论是_____ .(填写所有正确结论的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc130e4f2499cc620a0df6542d8127b.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a1fc2305fd371a1ff1f91cd834140e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbf3ad83cac73ee5024f74c2adc6a5e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bfad3f7e65188bcf7f62ea5acdbf4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8cc0b4997cae4d8aec791a1d3923314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cdefec9c63d5754a2b73a232698c523.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1453a85edbadf0f7213d7f82981162cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc437778a8152b02b46741436c1a700d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/c09f6a0e-e3b8-4f5c-bd79-f67774c33037.png?resizew=124)
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2021-11-06更新
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299次组卷
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4卷引用:广东省广州市海珠区2021-2022学年九年级上学期期中数学试题
名校
2 . 在数学活动课上,老师出了一道题,让同学们解答.
在
中,过点B作
于点E,点F在边
上,
,连接
.求证:四边形
是矩形.
小星和小红分别给出了自己的思路:
小星:利用矩形的定义“有一个角是直角的平行四边形叫做矩形”来证明;
小红:利用定理“有三个角是直角的四边形是矩形”来证明.
(2)请选择小红或小星的思路完善证明过程.
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b937442ad4cc480adc11bb143559454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c581dab991aeadf06d972e47673ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87e1fe20bb0e8292e993657e14bc79a.png)
小星和小红分别给出了自己的思路:
小星:利用矩形的定义“有一个角是直角的平行四边形叫做矩形”来证明;
小红:利用定理“有三个角是直角的四边形是矩形”来证明.
(2)请选择小红或小星的思路完善证明过程.
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4卷引用:吉林省长春市朝阳区第二实验学校2023-2024学年九年级上学期12月月考数学试题
名校
3 . 如图,已知正方形ABCD,P、Q分别在AB、BC的延长线上,且BP=CQ;连接AQ、DP交于点O,分别与边CD,BC交于点F,E,连接AE,现给出以下结论:①AQ⊥DP;②
;③
;④当
时,
;其中正确的是______ (写出所有正确结论的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88186c7cccff616000160ec6819f7691.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/130ee2f713b6cb6de244dcfb96dda769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a863c96a31a4fd3ad53bbc5b1dcd95f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47c27cff2e07f42536ba7e9112280390.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/14/07a21281-2b54-43cc-8c44-4990ffffcd9e.png?resizew=160)
您最近一年使用:0次
4 . 如图,正方形
,点E,F分别在边
,
上,
,
,
与
交于点M,
与
交于点N,延长
至G,使
,连接
.有如下结论:①
;②
;③
;④
.上述结论中,所有正确结论的序号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/e065e944-c88c-45c6-a932-8865aab5df30.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a3600b1760a63a10c9a0429b439dc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce33c23cc79d51dbfeeb4fba58cc34f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff9d3708405c85bdb3c9798bbe75b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9e953a4a5f98c96bbe67cbaadf76d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783b84ed8d927b77491092f7d2ee2989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a8cd58c8eff3c7aaf382a5539c18a53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e29c73e214f76d207a43136267d4c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7891a014d7ea262d03ac52f65f1b170d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/15/e065e944-c88c-45c6-a932-8865aab5df30.png?resizew=150)
A.①② | B.①③ | C.①②④ | D.②③④ |
您最近一年使用:0次
2023·上海·中考真题
真题
名校
5 . 已知在梯形
中,连接
,且
,设
.下列两个说法:
①
;②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/769c127382e17b013d8719711a34623a.png)
则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e2d3ea3bdfca7111b823bb1c381a0f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92b09f88aee4ed088bf9b86fd5bc53b.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03d4f802e28c8339a96e14d9312ff89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/769c127382e17b013d8719711a34623a.png)
则下列说法正确的是( )
A.①正确②错误 | B.①错误②正确 | C.①②均正确 | D.①②均错误 |
您最近一年使用:0次
2023-06-19更新
|
1019次组卷
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10卷引用:2023年上海市中考数学真题
(已下线)2023年上海市中考数学真题(已下线)专题17 几何压轴题-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(全国通用)(已下线)2023年上海市中考数学真题变式题5-9题(已下线)专题01梯形(2大易错点+3大提分策略+强化训练)-备战2024年中考数学考试易错题(上海专用)江苏省南京市玄武区南京玄武外国语学校2023-2024学年九年级下学期3月月考数学试题(已下线)热点06 四边形与向量(9大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(上海专用)(已下线)重难点01 选择题、填空题压轴题(9大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(上海专用)(已下线)专题04 四边形(7大热点题型)-2024年中考数学毕业班二轮热点题型归纳与变式演练(上海专用)(已下线)专题15 四边形综合(一)(五大热点题型归纳)-2024年中考数学二轮热点题型归纳与变式演练(云南专用)(已下线)专题6.15 平行四边形(全章直通中考)(培优练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(北师大版)
6 . 如图,
与
中,
,
,
,
交
于D.给出下列结论:
①
;②
;③
;④
.
其中正确的结论是__________ (填写所有正确结论的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a277db452e76240ec83ec6a2864bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da8fe8f5f8a3f17561d70652ad1172a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79de59390a7059cfdea1f42ce1ffac70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547d041ea7de3b74e60c63d2e9187030.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d390df2733a81db86f0556dba8af0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff70e81ab6c8167ac342cf0a09bcb69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97abb714e773be1d8ce700ca2049ba24.png)
其中正确的结论是
![](https://img.xkw.com/dksih/QBM/2022/1/6/2894319211192320/2959554645876736/STEM/d593789c-9f4c-4934-bf15-8724d6c3a32d.png?resizew=163)
您最近一年使用:0次
2022-04-16更新
|
444次组卷
|
3卷引用:2023年浙江省衢州市龙游县城南初级中学中考一模数学试题
2023年浙江省衢州市龙游县城南初级中学中考一模数学试题安徽省池州市贵池区2021-2022学年八年级上学期期末数学试题(已下线)专题12.2.2 三角形全等的判定2(SAS)-【帮课堂】2022-2023学年八年级数学上册同步精品讲义(人教版)
真题
名校
7 . 如图,在正方形ABCD中,点M、N分别为边CD、BC上的点,且DM=CN,AM与DN交于点P,连接AN,点Q为AN的中点,连接PQ,BQ,若AB=8,DM=2,给出以下结论:①AM⊥DN;②∠MAN=∠BAN;③
PQN≌
BQN;④PQ=5.其中正确的结论有 _____ (填上所有正确结论的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/4ef9725b-d38f-432f-bcb3-42fb11669c18.png?resizew=163)
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2022-04-07更新
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1330次组卷
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11卷引用:2022年广东省广州市天河区华南师范大学附属中学中考一模数学试题
2022年广东省广州市天河区华南师范大学附属中学中考一模数学试题四川省遂宁市射洪中学外国语实验校2021-2022学年九年级下学期第一次月考数学试题(一模)2022年山东省德州市夏津县中考一练数学试题2022年山东省聊城市冠县中考一模数学试题(已下线)广东卷A-2022年中考数学模拟考场仿真演练卷广州市天河区汇景实验学校2022-2023学年九年级上学期数学期末测试卷 2023年山东省临沂市河东区中考二模数学试题2021年四川省攀枝花市中考数学试卷2021年广东省广州市花都区中考二模数学试题2021年广东省广州市增城区中考二模数学试题(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)
名校
8 . 已知:如图,正方形ABCD中,AB=4,AC,BD相交于点
,E,F分别为边BC,CD上的动点(点E,F不与线段BC, CD的端点重合)且BE=CF,连接OE,OF,EF.在点E,F运动的过程中,有下列四个结论:
①△OEF始终是等腰直角三角形;
②△OEF面积的最小值是2;
③至少存在一个△ECF,使得△ECF的周长是
;
④四边形OECF的面积始终是4.
所有正确结论论的序号是( )
![](https://img.xkw.com/dksih/QBM/2021/8/14/2786263370162176/2795970643951616/STEM/3836b77c-0a24-44ce-ba4d-f5f4f1a2fc92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
①△OEF始终是等腰直角三角形;
②△OEF面积的最小值是2;
③至少存在一个△ECF,使得△ECF的周长是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb6f3d7540831a9e97d3b184a491.png)
④四边形OECF的面积始终是4.
所有正确结论论的序号是( )
![](https://img.xkw.com/dksih/QBM/2021/8/14/2786263370162176/2795970643951616/STEM/3836b77c-0a24-44ce-ba4d-f5f4f1a2fc92.png)
A.①②③ | B.③④ | C.①②④ | D.①②③④ |
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2021-08-28更新
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522次组卷
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5卷引用:九年级上学期期末考试模拟试卷-【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(浙教版)
(已下线)九年级上学期期末考试模拟试卷-【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(浙教版)北京市西城区第一六一中学2020-2021学年八年级下学期期中数学试题北京市161中2020-2021学年八年级下学期期中数学试卷北京市首都师范大学附属云岗中学2021-2022学年七年级下学期期中数学试题北京教育学院附属中学2022~2023学年八年级下学期期中数学试题
9 . 如图,已知点D在射线
上
,
平分
与
,求证
.小明的证明过程如下:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/11/b04404a9-2775-4473-ae47-bfe17962f7c8.png?resizew=148)
小明的证明是否正确?若正确,请在框内打“√”,若错误,请写出你的证明过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532aece6cfd67e2a97977eed978dbf2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a72dfbf0138a611174c36ce077e0c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/11/b04404a9-2775-4473-ae47-bfe17962f7c8.png?resizew=148)
证明:![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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2023-05-04更新
|
144次组卷
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4卷引用:2023年浙江省嘉兴市桐乡市中考一模数学试题
10 . 如图,△ABC中,
,
,D是AC边上一点,将线段BD绕点B顺时针旋转90°至BE,连接CE,DE,DE与BC相交于点F.现给出以下结论:①
;②
;③当
时,
;④连接AE,则
的最小值为
.其中正确的是______ .(写出所有正确结论的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37750daa8ba3b3fe3e9e2092f81c848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63fe1d25e8f83d2ea6b444f8a00fb2fd.png)
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