名校
1 . 如图,在边长为4的正方形
中,点E,F分别是
,
的中点,
,
相交于点H、
的中点为点G,连接
,
.给出下列结论:①
;②
;③
;④
.其中,正确的有___________ (请填写正确结论的序号)
![](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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd5bdb4f4a18dd95a6296d7e67a8670e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e48390997d483f49c99a4dd44444c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870c40853abf09720cce2d6aa700f5f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4897ed1675313de2e8e46ee595a9ae2e.png)
![](https://img.xkw.com/dksih/QBM/2022/10/14/3087353844260864/3089455062532096/STEM/4cff20cbfc454e78b8c09dbda757b1d6.png?resizew=155)
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2卷引用:陕西省西安市雁塔区陕西师范大学附属中学2022-2023学年九年级上学期第一次月考数学试卷
2018九年级·全国·专题练习
2 . 如图,边长为4的正方形
内接于
,点E是
上的一个动点(不与A、B重合),点F是
上的一点,连接
,分别与
交于点G、H,且
,有下列结论:①
;②
一定是等腰三角形;③四边形
的面积随点E位置的变化而变化;④
周长的最小值为
.其中正确的是______ .(把所有正确结论的序号填上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2989121aadb34ae5ec4ff4b8dd95042c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3355e2fa0ac6c675f02ee36c3ced4f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/319ff9f648fedec284a11a9761cb6183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f8eebda19eded2b059774a8c2666c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa2947ec9518014cf7fe409629553618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf4b59d26e206d12ebc3e0c5404673e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e203324622d601619407cb2b6045cc6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1734bef717187708351c1be3bd035071.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/597a1994-63ff-4bdf-ab73-d2cbc12ad018.png?resizew=131)
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14卷引用:决胜2018中考压轴题全揭秘 专题17 圆问题
(已下线)决胜2018中考压轴题全揭秘 专题17 圆问题(已下线)决胜2018中考压轴题全揭秘 专题24 几何综合问题2018年辽宁省鞍山市铁西区中考数学模拟试卷(3月份)(已下线)决胜2018中考压轴题全揭秘 专题23 最值问题【全国区级联考】辽宁省鞍山市铁西区2018届九年级数学中考模拟试卷【区级联考】江苏省无锡市新吴区2018届中考数学模拟试卷浙教版九年级数学上册期末专题:期末综合检测试题湖北省咸宁市咸安区2019-2020学年九年级上学期期末数学试题(已下线)【万唯原创】安徽省2017年中考数学-试题研究-正文-第二部分题型2湖北省崇阳县桃溪中学2022-2023学年九年级上学期第二次月考数学试题河南省周口市西华县2018届九年级上学期期中考试数学试题(已下线)九年级数学期末模拟卷(湖北武汉专用)(人教版九上全册)-学易金卷:2023-2024学年初中上学期期末模拟考试辽宁省铁岭市2023-2024学年九年级上学期期末数学试题辽宁省铁岭市铁岭县2023-2024学年九年级上学期期末数学试题
3 . 如图,在矩形
中,将
绕点
逆时针旋转
得到
,
、
、
三点恰好在同一直线上,
与
相交于点
,连接
,现有以下结论:①
;②
;③
;④
.其中正确的是____________ .(写出所有正确结论的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc7f32e4c7d1fcafc3fe0dbcf08fdd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589ddae20626f9aaac616d2a3b5d95bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3167d4fac111324e352ba4018830a487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c25ae0a086f3facbfcabd8c7d4fa9cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52b046caf702e45c4eba4823e5c25630.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/55279490-55c9-4135-8788-5e6a42c33595.png?resizew=159)
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4 . 如图,正方形ABCD中,点E是对角线BD上一点,且BE=2DE,连接AE并延长交CD于点P,点F是BC边上一点,且CF=2BF,连接AF交BD于点G,连接EF,PF.下列四个结论:①DP=CP;②S△ABF=S△FCP;③AE=EF;④∠DPF=2∠BGF.其中正确的结论是 _____ .(写出所有正确结论的序号)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/28/07f65494-9aa2-4a6c-a6d3-ad5da9ff5853.png?resizew=142)
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5 . 学习过菱形性质后,数学兴趣小组活动中,小明编制了一道数学题目:如图1,菱形ABCD中,
,点M为射线AB上一个动点,将射线DM绕点D逆时针旋转
,交直线BC于点N,若
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e395831eddeca6f5ae769b2dfa2b4d.png)
下面是小组的讨论,请仔细阅读并完成下述任务:
小明:我的证法是在
和
中,
,
,
,
,
.
小亮:我觉得小明的题设中
是多余的,没有这个条件也能证出
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/c50bcfc5-72cf-46e5-9163-26de2a3b1230.png?resizew=353)
(1)小明得出的依据是 (填序号).
①SSS;②SAS;③AAS;④ASA;⑤HL
(2)小亮的说法是否正确?若正确,请给出证明;若不正确,请说明理由
(3)若
,
,直接写出DN的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049ba02a6816033ade98e679a59a3b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e395831eddeca6f5ae769b2dfa2b4d.png)
下面是小组的讨论,请仔细阅读并完成下述任务:
小明:我的证法是在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/101da161ae17652ccbe7d3f888762c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/484d1cd79c2f3230a7bd65ae99a3edae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6155588b411c8e88398f0916a23c0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c017a7cbd4fa27b0dc4fe43a710ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b2ca779bf6b4e9919e3181fcfee2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaae277348b29d11034ab42c12ebb929.png)
小亮:我觉得小明的题设中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/049ba02a6816033ade98e679a59a3b24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e395831eddeca6f5ae769b2dfa2b4d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/c50bcfc5-72cf-46e5-9163-26de2a3b1230.png?resizew=353)
(1)小明得出的依据是 (填序号).
①SSS;②SAS;③AAS;④ASA;⑤HL
(2)小亮的说法是否正确?若正确,请给出证明;若不正确,请说明理由
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fa0a286a55692e4263a5993b01580b.png)
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6 . 如图,已知等边三角形
绕点
顺时针旋转
得到
,
,
分别为线段
和线段
上的动点,且
,有以下结论:①四边形
为菱形;②
;③
为等边三角形;④
.其中正确结论有__________ .(填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73636989e83905f8800a865c2b608c43.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de1fcf1e0478a197a3602336bf6f484a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc2e0d8bfe96db9b3563c9bcf14ed140.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/dcfe1882-12c5-453d-bb57-d1b78312a565.png?resizew=168)
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|
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6卷引用:四川省广安市岳池县2021-2022学年九年级上学期期末数学试题
四川省广安市岳池县2021-2022学年九年级上学期期末数学试题(已下线)专题1.4 菱形的性质与判定(拓展篇)(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)专题1.3 菱形的性质与判定(巩固篇)(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)专题1.13 特殊平行四边形动点问题(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)广东省梅州市五华县五华县中英文实验学校2022-2023学年九年级上学期2月期末数学试题山东省济南市2023-2024学年九年级上学期期末数学试题
7 . 如图所示,菱形
中,
,点E,F分别为边
、
上的点,且
,连接
交于点H,连接
交
于点O,则下列结论:①
;②
;③
;④
.其中结论是__________ .(将所有正确结论的序号都填入).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f8eebda19eded2b059774a8c2666c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9117e6bcc1d2bfb3f1f8f5f227a3715b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7755cad7aa7c2b6baf04fd99311f8c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdbb1fe0998e595c6e9cf59beca1c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b7029e8eeb176de7862059587d1f29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f0d74cd7ecaa5e945d13e215f1aa72f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/24/47b30ac5-bf70-4bb8-8881-57d1d96322f1.png?resizew=182)
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8 . 读下面的材料:定理:三角形的中位线平行于第三边,并且等于第三边的一半.
已知:如图1,在
中,
分别是边
的中点.
求证:
,且
.
证明:延长
到点
,使
,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3fb1fa1e4b09b896be72fd012ccdd92.png)
甲:如图2,先证明
,再推理得出四边形
是平行四边形.
乙:如图3,连接
;先后证明四边形
分别是平行四边形.
下列判断正确的是( )
已知:如图1,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950e82a0f9712457f2dd9f8a93f8a217.png)
证明:延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9a9618018d717926540d1452f76e44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3fb1fa1e4b09b896be72fd012ccdd92.png)
甲:如图2,先证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/471dd62814e107c3489c0527e00e2696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d15047493914a7de990b3b905875436.png)
乙:如图3,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d62a246e3127dcaa9b84924aff736ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a8cf8626bfcc5bd0ffd318e6913597.png)
下列判断正确的是( )
A.甲思路正确,乙思路错误 | B.甲思路错误,乙思路正确 |
C.甲、乙两人思路都正确 | D.甲、乙两人思路都错误 |
您最近一年使用:0次
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|
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4卷引用:2023年河北省石家庄市长安区初中毕业生基础知识质量检测数学试卷
2023年河北省石家庄市长安区初中毕业生基础知识质量检测数学试卷 2024年河北省邯郸市第十三中学中考模拟数学试题(已下线)作业04 平行四边形的性质和判定-2023年【暑假分层作业】八年级数学(苏科版)山东省泰安市泰山区2023-2024学年八年级上学期期末数学试题
名校
9 . 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.
您最近一年使用:0次
2024-01-05更新
|
158次组卷
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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
10 . 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