1 . 阅读与思考:
我们知道,如图1,在四边形
中,点
,
,
,
分别是边
,
,
,
的中点,顺次连接
,
,
,
,得到的四边形
是平行四边形.这个平行四边形
是四边形
的中点四边形,也称为瓦里尼翁平行四边形.瓦里尼翁平行四边形与原四边形关系密切.
①当原四边形的对角线满足一定关系时,瓦里尼翁平行四边形可能是菱形、矩形或正方形.
②瓦里尼翁平行四边形的周长与原四边形对角线的长度也有一定关系.
③瓦里尼翁平行四边形的面积等于原四边形面积的一半,此结论可借助图1证明如下:
,分别交
,
于点
,
,
,
分别为
,
中点,
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39addc1173a458af87ed5c5e3f06466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad64fc74166b877ab80444ded864a737.png)
.
∵
,
分别为
,
中点,
∴________
________(填空1)
∴________
________(填空2)
∴四边形
是瓦里尼翁平行四边形.
任务:
(1)填空1:________
________;填空2:________
________
(2)矩形的瓦里尼翁平行四边形是( )
A.平行四边形 B.菱形 C. 矩形 D.正方形
(3)菱形的瓦里尼翁平行四边形是( )
A.平行四边形 B.菱形 C. 矩形 D.正方形
(4)在图1中,分别连接
,
得到图3,请猜想瓦里尼翁平行四边形
的周长与对角线
,
长度的关系,并证明你的结论.
我们知道,如图1,在四边形
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
①当原四边形的对角线满足一定关系时,瓦里尼翁平行四边形可能是菱形、矩形或正方形.
②瓦里尼翁平行四边形的周长与原四边形对角线的长度也有一定关系.
③瓦里尼翁平行四边形的面积等于原四边形面积的一半,此结论可借助图1证明如下:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/b39addc1173a458af87ed5c5e3f06466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad64fc74166b877ab80444ded864a737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c93148adbc6e856da9a9d263f485d003.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
∴________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad64fc74166b877ab80444ded864a737.png)
∴________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad64fc74166b877ab80444ded864a737.png)
∴四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
任务:
(1)填空1:________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad64fc74166b877ab80444ded864a737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad64fc74166b877ab80444ded864a737.png)
(2)矩形的瓦里尼翁平行四边形是( )
A.平行四边形 B.菱形 C. 矩形 D.正方形
(3)菱形的瓦里尼翁平行四边形是( )
A.平行四边形 B.菱形 C. 矩形 D.正方形
(4)在图1中,分别连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
名校
解题方法
2 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09c6e2075d7f39cf14a430665a99db6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad98ad714864041a632ca949308e417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcb0803e134a985e6b444138f75968d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97392ff60fac8a261c6eab71bba028b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)探究应用:
如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3efffb3e6a571832b723b3c5795b8e8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c66b632c49dbebc4b2182592d68ee937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)问题拓展:
如图③,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac37366d2b54dc7d9a95ac6ddda5f3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c19d1cd4d7baa5906ce4478c8ca665d.png)
您最近一年使用:0次
2024-03-07更新
|
269次组卷
|
26卷引用:山东省日照市五莲县2020-2021学年八年级上学期期末数学试题
山东省日照市五莲县2020-2021学年八年级上学期期末数学试题福建省三明市列东中学2020-2021学年八年级下学期期中数学试题2022年山东省烟台市中考模拟数学试题(二)(已下线)第12讲 全等三角形的相关辅助线-【暑假自学课】2022年新八年级数学暑假精品课(人教版)(已下线)专题12.34 作辅助线证明三角形全等-倍长中线(培优篇)(专项练习)-2022-2023学年八年级数学上册基础知识专项讲练(人教版)贵州省六盘水市2021-2022学年七年级下学期期末数学试题山东省济南市历城区2021-2022学年七年级下学期期末数学试题山东省德州市齐河县2021-2022学年八年级上学期期末数学试题江苏省镇江市镇江新区2022-2023学年八年级上学期10月阶段性练习数学试题(已下线)重难点01 全等三角形(6种模型) -2022-2023学年八年级数学考试满分全攻略(人教版)(已下线)专题12.1 全等三角形九大基本模型 专项讲练-2022-2023学年八年级数学上册重难题型全归纳及技巧提升专项精练(人教版)重庆市綦江区綦江区古南中学2022-2023学年八年级上学期11月月考数学试题(已下线)专题11 倍长中线证全等-【微专题】2022-2023学年八年级数学上册常考点微专题提分精练(人教版) 山东省济南东南片区2021-2022学年七年级下学期期末考试数学试题(已下线)专题1.2 全等三角形相关辅助线五种方法 专项讲练-2022-2023学年八年级数学上册重难题型全归纳及技巧提升专项精练(苏科版) 四川省乐山市沐川县2022-2023学年八年级上学期期末考试数学试题(已下线)重难点02全等三角形中“倍长中线”模型-【暑假自学课】2023年新八年级数学暑假精品课(苏科版)(已下线)专题02 全等三角形中的辅助线与模型(五大题型)-【好题汇编】备战2023-2024学年八年级数学上学期期中真题分类汇编(苏科版)(已下线)12.3(培优课)倍长中线(题型精讲精练)-【题型分类精粹】2023-2024学年八年级数学上学期期中期末复习讲练系列【考点闯关】(人教版)湖北省孝感市云梦县2023-2024学年八年级上学期期中数学试题湖南省邵阳市北塔区芙蓉学校2023-2024学年八年级上学期期中数学试题(已下线)八年级数学期末真题【考题猜想,压轴60题21个考点专练】-2023-2024学年八年级数学上学期期末考点大串讲(苏科版)湖南省邵阳市新邵县2023-2024学年八年级上学期期中数学试题(已下线)专题04 平行四边形与菱形(考点清单+20种题型解读)-2023-2024学年八年级数学下学期期中考点大串讲(苏科版)(已下线)专题03 中心对称与三角形的中位线(四种考法)-【好题汇编】备战2023-2024学年八年级数学下学期期中真题分类汇编(湖南专用)(已下线)专题09 三角形的中位线与多边形的内角和、外角和(9大题型+优选提升题)-备战2023-2024学年八年级数学下学期期末真题分类汇编(北师大版)
名校
3 . 定义:对角线垂直的四边形叫做“对垂四边形”.如图,在“对垂四边形”
中,对角线
与
交于点O,
.若点E、F、G、H分别是边
、
、
、
的中点,且四边形
是“对垂四边形”,则四边形
的面积是___________ .
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c14a66ed4bd66df65bc42c4ac1ed15c.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
您最近一年使用:0次
2023-07-08更新
|
205次组卷
|
4卷引用:浙江省湖州市南浔区2022-2023学年八年级下学期期末数学试题
浙江省湖州市南浔区2022-2023学年八年级下学期期末数学试题宁夏银川外国语实验学校2023-2024学年九年级上学期期中数学试题浙江省杭州市拱墅区青春中学2023-2024学年八年级下学期期中数学试题(已下线)专题05 中点模型之中位线、斜边中线、中点四边形期末真题汇编【六大题型+优选提升题】-备战2023-2024学年八年级数学下学期期末真题分类汇编(人教版)
4 . (1)回归课本
请用文字语言表述三角形的中位线定理:________________.
(2)回顾证法
证明三角形中位线定理的方法很多,但多数都要通过添加辅助线构图完成.下面是其中一种辅助线的添加方法.请结合图2,补全求证及证明过程.
已知:在
中,点
分别是
的中点.
求证:________________.
证明:过点
作
,与
的延长线交于点
.
(3)实践应用
如图3,点
和点
被池塘隔开,在
外选一点
,连接
,分别取
的中点
,测得
的长度为9米,则
两点间的距离为________________.
请用文字语言表述三角形的中位线定理:________________.
(2)回顾证法
证明三角形中位线定理的方法很多,但多数都要通过添加辅助线构图完成.下面是其中一种辅助线的添加方法.请结合图2,补全求证及证明过程.
已知: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:________________.
证明:过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00a5239269d72d6f9632e7d77347106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(3)实践应用
如图3,点
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
您最近一年使用:0次
2023-07-04更新
|
207次组卷
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6卷引用:河南省三门峡市灵宝市2022-2023学年八年级下学期期末数学试题
河南省三门峡市灵宝市2022-2023学年八年级下学期期末数学试题第23章 图形的相似 23.4 中位线华东师大版(2012)九年级上册课后作业(已下线)专题18.7 三角形的中位线(知识梳理与考点分类讲解)-2023-2024学年八年级数学下册基础知识专项突破讲与练(人教版)湖南省永州市道县2023-2024学年八年级下学期月考数学试题(已下线)八年级数学期末必刷题02(常考题,58题22种题型)-2023-2024学年八年级数学下学期期末考点大串讲(苏科版)(已下线)专题09 三角形的中位线与多边形的内角和、外角和(9大题型+优选提升题)-备战2023-2024学年八年级数学下学期期末真题分类汇编(北师大版)
5 . 如图,在梯形
中,
,点E、F分别是
、
的中点,如果
,
.那么![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ec5d678ec42846e1d28301e3bfd4be.png)
______ .
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1496042c1d721cffd25053e997a9a97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ec5d678ec42846e1d28301e3bfd4be.png)
您最近一年使用:0次
6 . 已知:
,
为
边上的中线,点M为
上一动点(不与点
重合),过点
作
,过点
作
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/8c5c4709-2da4-46d4-9ca9-09abf1c1e8f1.png?resizew=504)
(1)如图1,当点
与点
重合时,求证①
;②四边形
是平行四边形;
(2)如图2,当点
不与点
重合时,试判断四边形
还是平行四边形吗?如果是,请证明:如果不是,请说明理由;
(3)如图3,延长
交
于点
,若
,请求出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8259e9e758dfd24a4c0db36b5a39a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec5d3a183594be47dd6e386d2c9d725.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/8c5c4709-2da4-46d4-9ca9-09abf1c1e8f1.png?resizew=504)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/009c91b362f5efa87f14ffce3b7228f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d6bdc69ab38fadcc5bec71174450f3.png)
(2)如图2,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d6bdc69ab38fadcc5bec71174450f3.png)
(3)如图3,延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5281b8695d397a2531f55a1b01006193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d641de320b307374639e50dba2f2212.png)
您最近一年使用:0次
7 . 如图平行四边形
中,
与
交于点
,
,
,
,
分别是
,
,
的中点,下列结论:①
为等腰三角形;②四边形
为正方形;③
;④
;⑤
;⑥
平分
.其中正确的有 __ .
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc591be09f7a5e7cca8fcdf68fa7d93e.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802be3edfbcb158fbee00e0479a5ecfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbad16d8800f6d55bd66bd64b1370e4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8451fe5f968444933f65c6016069c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc44765e15bb97475448eaa2c88e5e8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d23ef0e0dfbf7ed388c2d50f5b5b7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec88884321733714de9db5466629ccf2.png)
![](https://img.xkw.com/dksih/QBM/2022/7/5/3015935898779648/3054476418859008/STEM/dc515f6db8a843babb8146059ff9f1b8.png?resizew=165)
您最近一年使用:0次
8 . 如图,在四边形ABCD中,点E,F,G,H分别为边AB,BC,CD,DA的中点.
(2)若四边形ABCD的对角线互相垂直且它们的乘积为48,求四边形EFGH的面积.
(2)若四边形ABCD的对角线互相垂直且它们的乘积为48,求四边形EFGH的面积.
您最近一年使用:0次
2022-08-02更新
|
679次组卷
|
6卷引用:浙江省台州市仙居县2021-2022学年八年级下学期期末数学试题
浙江省台州市仙居县2021-2022学年八年级下学期期末数学试题(已下线)第一章 特殊平行四边形(A卷·知识通关练)-【单元测试】2022-2023学年九年级数学上册分层训练AB卷(北师大版)(已下线)专题05平行四边形六大模型(知识串讲+热考题型)-2022-2023学年八年级数学下学期期中期末考点大串讲(人教版)(已下线)重难点02平行四边形(6种模型与解题方法)-【满分全攻略】2022-2023学年八年级数学下学期核心考点+重难点讲练与测试(浙教版)(已下线)第4章平行四边形(5种模型与解题方法)-2023-2024学年八年级数学下学期考试满分全攻略高频考点+重难点讲练与测试(浙教版)(已下线)专题03平行四边形全章复习攻略(1个定理1个性质4个图形的性质与判定4个技巧2种思想专练)-2023-2024学年八年级数学下学期期末考点大串讲(人教版)
9 . 下列命题是假命题的是( )
A.顺次连接矩形各边的中点所成的四边形是菱形 | B.四个角都相等的四边形是矩形 |
C.一组对边平行且相等的四边形是平行四边形 | D.对角线互相垂直且相等的四边形是正方形 |
您最近一年使用:0次
2022-07-20更新
|
168次组卷
|
2卷引用:重庆市开州区2021-2022学年八年级下学期期末数学试题
真题
10 . 如图,在四边形
中,点
,
,
,
分别是
,
,
,
边上的中点,则下列结论一定正确的是( )
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
A.四边形![]() |
B.四边形![]() ![]() |
C.四边形![]() ![]() |
D.四边形![]() ![]() ![]() |
您最近一年使用:0次
2022-06-14更新
|
1895次组卷
|
28卷引用:2022年四川省德阳市中考数学真题
2022年四川省德阳市中考数学真题(已下线)专题13 特殊的平行四边形-2022年中考数学真题分项汇编(全国通用)(第1期)(已下线)专题07 四边形-2022年中考数学真题分项汇编 (四川专用)(已下线)专题15 多边形及特殊四边形-三年(2020-2022)中考数学真题分项汇编(四川专用)河北省承德市丰宁县2021-2022学年八年级下学期期末考试数学试题(已下线)2022年四川省眉山市中考数学变式题7-12山东省临沂市兰山区2021-2022学年八年级下学期期末数学试题山西省太原市迎泽区新力惠中学2022-2023学年九年级上学期9月月考数学试卷(已下线)第一次月考押题培优02卷(考试范围:1.1-3.2)-【微专题】2022-2023学年九年级数学上册常考点微专题提分精练(北师大版)(已下线)2022年四川省德阳市中考数学真题变式题6-10题(已下线)2022年四川省达州市中考数学真题变式题6-10题(已下线)矩形、菱形、正方形02小题测(已下线)专题05平行四边形六大模型(知识串讲+热考题型)-2022-2023学年八年级数学下学期期中期末考点大串讲(人教版)(已下线)专题5.6 特殊四边形(中考真题专练)-2022-2023学年八年级数学下册同步精品课堂(浙教版)2023年山东省临沂市罗庄区中考二模数学试题山东省烟台市福山区(五四制)2022-2023学年八年级下学期期末数学试题(已下线)专题14 多边形与平行四边形-学易金卷:三年(2021-2023)中考数学真题分项汇编(四川专用)山东省淄博市博山区2023-2024学年八年级上学期期末数学试题(已下线)专题9.35 三角形的中位线(直通中考)(基础练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(苏科版)2024年辽宁省辽阳市二中协作校中考数学第一次模拟试题2024年辽宁省沈阳市法库县东湖第二初级中学中考一模数学模拟试题(已下线)专题18.26 正方形(直通中考)(提升练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(人教版)辽宁省本溪市2023-2024学年九年级下学期4月月考数学试题甘肃省武威市凉州区凉州区高坝中学联片教研2023-2024学年八年级下学期4月期中数学试题(已下线)重难点05 四边形压轴类型归纳(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(广东专用)(已下线)考题猜想9-1 中心对称图形-平行四边形(培优+拔尖,12种题型)-2023-2024学年八年级数学下学期期末考点大串讲(苏科版)(已下线)第4章平行四边形(5种模型与解题方法)-2023-2024学年八年级数学下学期考试满分全攻略高频考点+重难点讲练与测试(浙教版)(已下线)专题03平行四边形全章复习攻略(1个定理1个性质4个图形的性质与判定4个技巧2种思想专练)-2023-2024学年八年级数学下学期期末考点大串讲(人教版)