已知:如图,E、F是▱ABCD的对角线AC上的两点,AF=CE.
求证:(1)△ABE≌△CDF;
(2)ED∥BF.
求证:(1)△ABE≌△CDF;
(2)ED∥BF.
12-13九年级上·山东东营·期末 查看更多[24]
(已下线)2012届山东省东营济军生产基地实验学校九年级上学期阶段检测数学卷2014届江苏无锡市硕放中学九年级第一学期期中考试数学试卷2014-2015学年江苏省无锡市新区八年级下学期期中考试数学试卷2015-2016学年江苏省无锡市华士片八年级下学期期中考试数学试卷2015-2016学年福建泉州市南安实验中学八年级下期中数学试卷2015-2016学年江苏张家港二中八年级下期中考试数学试卷2016-2017学年浙江省桐乡市实验中学片区第二学期期中联考八年级数学试卷北师大版八年级数学上册 第七章 平行线的证明 单元测试2017-2018学年北师大版八年级下数学单元检测卷:平行四边形(基础卷)【全国校级联考】江苏省南京市江宁区湖熟片2017-2018学年八年级3月月考数学试题浙江省杭州市临安市2018年中考数学试卷陕西省宝鸡市金台中学2018—2019学年八年级第一学期期中考试数学试题【校级联考】江苏省东台市第四联盟2018-2019学年八年级下学期学情调查一数学试题江苏省泰兴市洋思中学2018-2019学年八年级下学期第一次月考数学试题【区级联考】江苏省无锡市新吴区2018-2019学年八年级下学期期中测试数学试题【校级联考】山东省德州市武城县2018-2019学年八年级下学期期中考试数学试题江苏省扬州市宝应县2018-2019学年八年级下学期期中数学试题辽宁省辽阳市第九中学2018-2019学年八年级下学期第三次学情测试数学试题山东省郓城县2018-2019学年八年级下学期期末数学试题山东省菏泽市郓城县2018-2019学年八年级下学期期末数学试题广东省东莞市2018-2019学年八年级下学期期中数学试题河南省驻马店市驿城区2018-2019学年八年级下学期期末数学试题山东省德州五中2019—2020学年八年级下学期第一次月考数学试题贵州省六盘水市2022-2023学年八年级下学期期末数学试题
更新时间:2019-05-21 18:25:06
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解答题-证明题
|
适中
(0.65)
【推荐1】在
中,
,过点
的直线
与边
平行,点
是
上一点,连接
,过点
作
,交
于
,
是
延长线上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/c7c402ab-c484-4f5f-908b-5e5141afe6f3.png?resizew=398)
(1)如图1,当
时.
①求证:
;
②求证:
.
(2)如图2,当
是任意锐角时,线段
与
仍相等吗?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
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![](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/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/c7c402ab-c484-4f5f-908b-5e5141afe6f3.png?resizew=398)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b2bd2c8cd947cda9b8bc1cdd7646066.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9935c67709d1d874d94192d3479639e.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
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您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图是由小正方形组成的
网格,每个小正方形的顶点叫做格点,四边形
的四个顶点都在格点上,仅用无刻度的直尺在给定网格中完成画图,画图过程用虚线表示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/8a418ccd-5e7c-412e-b11f-efb1f9c0b55a.png?resizew=456)
(1)图
中,在边
上画点
,使
;
(2)图
中,画
的角平分线
,交
于
;
(3)图
中,点
在格点上,
与
相切,切点为
,
交
于
,
①
与
相切,切点为
,
与
相切,切点为
,画出点
、
;
②在
上找点
,连接
,使GH
CD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490dbe9310ac070780745e3d504a953e.png)
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(1)图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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(2)图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(3)图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图1,在矩形
中,点E为对角线
上的一点(不与点A重合).将
沿射线
方向平移到
的位置,点E的对应点为点F.过点E作
,交
的延长线于点G,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/1ebeefcc-fee0-4533-b886-c0ff5b37ab2f.png?resizew=382)
(1)求证:
;
(2)求证:四边形
是平行四边形;
(3)如图2,连接
,若
,
,当
最小时,则
的长为____________________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/1ebeefcc-fee0-4533-b886-c0ff5b37ab2f.png?resizew=382)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54673b0722f7d784f43bbed25009f0a8.png)
(2)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8ee2f15613fb3c76e9a47ce99a176a1.png)
(3)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
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您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,四边形
中,
,且
,
、
分别是
、
的中点,
与
相交于点
.
![](https://img.xkw.com/dksih/QBM/2022/12/23/3136977577492480/3161110714089472/STEM/5fb626ccf17d4758a0b8b2de86edfa8c.png?resizew=152)
(1)求证:
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12143a06ed24558d8cc7ad39961d3e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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![](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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2022/12/23/3136977577492480/3161110714089472/STEM/5fb626ccf17d4758a0b8b2de86edfa8c.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/400159b4bacb3cb40bc0bc4abcbb3842.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3291e1c412a2adb49d3cb760b108dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐3】问题呈现:数学活动课上,老师出示了一个问题:将一个四边形沿某一条直线分割成两部分,重新再拼成一个新的特殊四边形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/e54dc54c-608d-4ea6-a418-a6373e1eee91.png?resizew=444)
初步操作:如图1,已知矩形
,
. 小明按以下操作得到了新四边形
.
①在
上截取点E,使得
;
②沿直线AE把矩形分割成两部分,将
沿
平移得到
.
理性思考:连接
,
,小明发现
. 请根据上述操作中得到的条件,帮助小明证明这个结论.
深入探究:如图,已知平行四边形
,
. 请按要求拼接出下列指定的新特殊四边形.(画出裁切线和拼接后的四边形,并标注必要的条件和字母)
①在图2中拼接出一个矩形;
②在图3中拼接出一个菱形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/e54dc54c-608d-4ea6-a418-a6373e1eee91.png?resizew=444)
初步操作:如图1,已知矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deb6694f3443cc5f4d09948679251b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c16d99496d31ce4d87301a4793393.png)
①在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
②沿直线AE把矩形分割成两部分,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13668f033d00acfc366f7e47949c4462.png)
理性思考:连接
![](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/876bb8ce0ca53475fa091ffd18bdc94a.png)
深入探究:如图,已知平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b9199a3de404cb13ae7710f73db5c8f.png)
①在图2中拼接出一个矩形;
②在图3中拼接出一个菱形.
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