1 . 如图,M、N分别是平行四边形
边
、
的中点,对角线
交
、
分别于点P、Q.
;
(2)当四边形
是正方形时,试从内角大小和邻边的数量关系的角度探究平行四边形
的形状特征.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4cb4069a2e1e90d1a9c4979ad09ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e883f81c66ceef54d2d0556a68ed585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22657b33f776a530eb204b06a5e2c999.png)
(2)当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f522fd962313a8a83a41882d9ceb6079.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
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2 . 如图,四边形
是矩形,E是对角线
上一点,
且
.
(1)求证:四边形
是正方形;
(2)若F是对角线
上一点,且
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ef9500289a895ad4d69f113a11e7525.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba677a5b6826cd76bdd5bfaad471904.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/d997c0ab-4b82-40e9-98c5-e4e396b5b05e.png?resizew=130)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若F是对角线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3762b4e44e4ac83dad5eddcac4351c73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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3 . 已知:如图,在正方形
中,点
在对角线
的延长线上,作
,且
,连接
.
;
(2)延长
交射线
于点
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ed934aa29859e93b1f758229a12581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac3d3b55561ec5d4acc242ecd1c7f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03687d97d61b4a7cecbb73f2a6604212.png)
(2)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c5002bfc6c60e7a7451ad1e68c6459.png)
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名校
4 . 已知:如图,在正方形
中,点
为边
的中点,连结
,点
在
上
,过点
作
交
于点
.
(1)求证:
;
(2)联结
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aebb5baea4ac1668b674a8634e15bcbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/961e9dfec7ad37b7f64e4a627cdb343c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0792d20f1b18cc0367c8a3ce5492296.png)
(2)联结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876bb8ce0ca53475fa091ffd18bdc94a.png)
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2021-02-19更新
|
345次组卷
|
9卷引用:上海市黄浦区民办立达中学2020-2021学年八年级下学期期中数学试题
上海市黄浦区民办立达中学2020-2021学年八年级下学期期中数学试题【全国区级联考】上海市浦东新区2018届九年级中考二模试卷数学试题四川省达州市第二中学2019届九年级上学期期末考试数学试题(已下线)第六章 四边形(1)(多边形和平行四边形)-备战2021年中考数学考点 核心考点清单(上海专用)(已下线)专题10 四边形(考点)-备战2021年中考数学考点微专题(上海专用)上海市徐汇区徐汇中学2021-2022学年九年级下学期期中数学试题(已下线)重难点01 相似三角形(5种模型) -2022-2023学年九年级数学考试满分全攻略(沪教版)(已下线)上海市八下期中真题精选(压轴大题60题15个考点分类专练)-2023-2024学年八年级数学下学期期中考点大串讲(沪教版)(已下线)上海市八年级下学期期末必刷压轴60题(18个考点专练)-2023-2024学年八年级数学下学期期末考点大串讲(沪教版)
5 . 如图1,在正方形ABCD中,AB=1,点E在AB延长线上,联结CE、DE,DE交边BC于点F,设BE
,CF
.
![](https://img.xkw.com/dksih/QBM/2013/12/25/1573692762931200/1573692769501184/STEM/50756bc394ed4c31a84b231497885558.png)
图1
(1)求
关于
的函数解析式,并写出
的取值范围;
(2)如图2,对角线AC、BD的交点记作O,直线OF交线段CE于点G,求证:
;
![](https://img.xkw.com/dksih/QBM/2013/12/25/1573692762931200/1573692769501184/STEM/b3f734d12ed641e085cc0c5527eb9830.png)
图2
(3)在(2)的条件下,当
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5e75eee7043d9a208f9364c2a5d645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c485b064e9ba8b78902bbec9e3fb16.png)
![](https://img.xkw.com/dksih/QBM/2013/12/25/1573692762931200/1573692769501184/STEM/50756bc394ed4c31a84b231497885558.png)
图1
(1)求
![](https://img.xkw.com/dksih/QBM/2013/12/25/1573692762931200/1573692769501184/STEM/e1fe9512c22f42a2b868e5a39a0fea85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)如图2,对角线AC、BD的交点记作O,直线OF交线段CE于点G,求证:
![](https://img.xkw.com/dksih/QBM/2013/12/25/1573692762931200/1573692769501184/STEM/971fd7c3db3f44e6b274c3aa1fc3601c.png)
![](https://img.xkw.com/dksih/QBM/2013/12/25/1573692762931200/1573692769501184/STEM/b3f734d12ed641e085cc0c5527eb9830.png)
图2
(3)在(2)的条件下,当
![](https://img.xkw.com/dksih/QBM/2013/12/25/1573692762931200/1573692769501184/STEM/9b703f5e9d4c4dbabfe961a7bea129bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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