1 . 如图,在平行四边形
中,对角线
交于点O,
,点E,F,G分别是
的中点,
交
于点H.有下列4个结论:①
;②
;③
;④
,其中说法正确的是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d6ceed6e5a36193bcb5a557853dbee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ae0459189681d5a94152fa14bcab30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/498704dc3943697c11ad488db3933f7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43dad1f58af0e8cb85dd1bfa7df597b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7c4e67fcd0cb85c38693f78a2442d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460274917b356507a7b904fb824a4dde.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/76bfcd96-269c-4f33-891f-6a91052dc036.png?resizew=169)
您最近一年使用:0次
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|
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2卷引用:2022-2023学年第二学期浙江省杭州市开元中学八年级期中考试数学试题
2 . 如图,在
中,对角线
,
相交于点O.
,E,F,G分别是
,
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/28/07ffba6e-7c0b-4e47-a143-a9246b2d888c.png?resizew=184)
(1)求证:
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.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/c2d6ceed6e5a36193bcb5a557853dbee.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://img.xkw.com/dksih/QBM/editorImg/2023/4/28/07ffba6e-7c0b-4e47-a143-a9246b2d888c.png?resizew=184)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
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2023-04-28更新
|
185次组卷
|
2卷引用:浙江省温州市第二中学2022-2023学年第二学期八年级期中考试数学试题
名校
3 . 我们定义:我们把对角线相等的四边形叫做和美四边形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/c2a94a88-fa59-4e6e-9d1e-2a66221a6f55.png?resizew=264)
(1)请举出一种你所学过的特殊四边形中是和美四边形的例子.
(2)如图1,
,
,
,
分别是四边形
的边
,
,
,
的中点,已知四边形
是菱形,求证:四边形
是和美四边形;
(3)如图2,四边形
是和美四边形,对角线
,
相交于
,
,
、
分别是
、
的中点,求
与
之间的数量关系.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/c2a94a88-fa59-4e6e-9d1e-2a66221a6f55.png?resizew=264)
(1)请举出一种你所学过的特殊四边形中是和美四边形的例子.
(2)如图1,
![](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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)如图2,四边形
![](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/dc1eb76fe74cba30f7cbcde349ba80da.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/03902478df1a55bc99703210bccab910.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/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
2023-04-28更新
|
378次组卷
|
12卷引用:【全国市级联考】2017-2018学年浙江省金华市永康市八年级(下)期末数学试卷
【全国市级联考】2017-2018学年浙江省金华市永康市八年级(下)期末数学试卷(已下线)【新东方】【义乌49】【2019】【初二下】浙江省金华市兰溪市外国语中学2019-2020学年八年级下学期第二次居家测试数学试题(已下线)2023年浙江省宁波市中考数学真题变式题21-24题【市级联考】福建省龙岩市2018-2919学年八年级第二学期下册期中联考数学试题【校级联考】福建省龙岩市永定区、长汀县联考2018-2019学年八年级(下)期中数学试题北京市西城区第四十一中学2018-2019学年八年级下学期期中数学试题广东省广州市广州大学附属中学2021-2022学年八年级下学期期中数学试题广东省广州市越秀区广州大学附属中学2021-2022学年八年级下学期期中数学试题广东省广州市天河区天河中学2022-2023学年八年级下学期期中考试数学试题福建省厦门市思明区莲花中学2022-2023学年八年级下学期期中考试数学试题山西省大同市第一中学校2022-2023学年八年级下学期5月月考数学试题
名校
4 . 如图,
是
的直径,
交
的中点于D,
.求证:
是
的切线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/3b5aa153-51c5-40ee-a31b-d97622123b04.png?resizew=152)
您最近一年使用:0次
2023-04-26更新
|
169次组卷
|
4卷引用:(挑战压轴)专项2.1 切线的证明方法归类(2大类型+5种方法)-2022-2023学年九年级数学下册《同步考点解读·专题训练》(浙教版)
(已下线)(挑战压轴)专项2.1 切线的证明方法归类(2大类型+5种方法)-2022-2023学年九年级数学下册《同步考点解读·专题训练》(浙教版)广东省广州市华南师范大学附属中学2022-2023学年九年级上学期数学期末卷(已下线)专题2.40 几何模型专题(切线的证明)(知识梳理与考点分类讲解)-2023-2024学年九年级数学上册基础知识专项突破讲与练(苏科版)(已下线)专题24.46 几何模型专题(切线的证明)(知识梳理与考点分类讲解)-2023-2024学年九年级数学上册基础知识专项突破讲与练(人教版)
5 . 如图,在
中,点M和N分别在边
和
上,
,连接
,点D,E,F,G分别是
的中点.求证:四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366975286639b9821763ea56330e4dc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332c66dc9bf6cef82185f5832e660fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c11cc952e2e120a5d5335050b5d40b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/fa32f49d-c660-44fb-b036-12dd7298807d.png?resizew=220)
您最近一年使用:0次
2023-04-25更新
|
240次组卷
|
3卷引用:专题5.2.2 菱形的判定(知识要点+专项练习)-2022-2023学年八年级数学下册同步精品课堂(浙教版)
(已下线)专题5.2.2 菱形的判定(知识要点+专项练习)-2022-2023学年八年级数学下册同步精品课堂(浙教版)2022-2023学年山西省太原市九年级上学期期末考试数学试题山西省忻州市代县等2地代县滩上镇教育办公室等2校2022-2023学年九年级上学期期末数学试题
名校
6 . (1)如图所示,矩形
中,
,将矩形
绕点B逆时针旋转
,得到新的矩形
,连接
,
,线段
交
于点G,连
.
和
的数量关系______,位置关系______;
②求证:
.
(2)如图所示,
中,
,
,将
绕点B逆时针旋转
,得到新的
,连接
,
,线段
,
相交于点G,点O为线段
中点,连
,在
旋转的过程中,
是否发生改变?如果不变,请求出
的值;如果发生改变,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151f7aef7d0f56e18562f5a4030cf815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89223131218e69a419c6813b48952196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc10340bb7f04e5d5e218aaffad8215.png)
(2)如图所示,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35209f869a13d3690a28cfec689c5c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1fbb1f69f91e628aa45e6265edca4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35209f869a13d3690a28cfec689c5c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efc7b22d85ff04a0ac89743f0bea1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43749248f6961c1016dab642a4244957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35209f869a13d3690a28cfec689c5c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3eb77ea6d03f69cc4121d1c13dfa54b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3eb77ea6d03f69cc4121d1c13dfa54b.png)
您最近一年使用:0次
2023-04-22更新
|
354次组卷
|
7卷引用:2023年浙江省舟山市四校联考中考数学二模模拟试题
2023年浙江省舟山市四校联考中考数学二模模拟试题2023年浙江省舟山市初中毕业生第二次质量监测四校联考二模数学模拟试题湖北省武汉市江岸区2022-2023学年八年级下学期期中数学试题(已下线)八年级下学期期中模拟03(人教版:二次根式、勾股定理、平行四边形)-2023-2024学年八年级数学下学期期中考点大串讲(人教版)湖北省黄石市阳新县部分学校2023-2024学年八年级下学期月考数学试题福建省莆田市荔城区莆田第八中学2023-2024学年八年级下学期期中数学试题福建省莆田市第八中学2023-2024学年八年级下学期期中数学试题
7 . (教材呈现)如图是华师版九年级上册数学教材第77页的部分内容.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/24/3a62f7e0-7863-4d81-89cf-ad81b7ab9d32.png?resizew=457)
(定理证明)(1)请根据教材内容,结合图①,写出证明过程.
(定理应用)(2)如图②,四边形
中,
分别为
的中点,边
延长线交于点
,
,则
的度数是_______.
(3)如图③,矩形
中,
,
,点
在边
上,且
.将线段
绕点
旋转一定的角度
,得到线段
,
是线段
的中点,直接写出旋转过程中线段
长的最大值和最小值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/24/3a62f7e0-7863-4d81-89cf-ad81b7ab9d32.png?resizew=457)
(定理证明)(1)请根据教材内容,结合图①,写出证明过程.
(定理应用)(2)如图②,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c60c6db49930fbbab66b1fab54f5449e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d13b8ae3d0d5e75afc0e862d5c2dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32bc8658ac6da92cfaf719cce9259c51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6414089941feb5d8a4a6a49566b9ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
(3)如图③,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.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/5d2e57629856cc8ed7ab28ca9ca76d5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c54ce139ae5d63691cac8a1ce5bbfe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/24/fe0915cc-bdd2-4027-82b9-3168c9a35cfe.png?resizew=392)
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6卷引用:第4章 平行四边形 章末检测卷-2022-2023学年八年级数学下册重难题型全归纳及技巧提升专项精练(浙教版)
(已下线)第4章 平行四边形 章末检测卷-2022-2023学年八年级数学下册重难题型全归纳及技巧提升专项精练(浙教版)河南省南阳市宛城区2020-2021学年九年级上学期期中数学试题(已下线)专题18.1 平行四边形-【帮课堂】2022-2023学年八年级数学下册同步精品讲义(人教版)(已下线)第9章 中心对称图形-平行四边形 章末检测卷-2022-2023学年八年级数学下册重难题型全归纳及技巧提升专项精练(苏科版)(已下线)专题6.3 三角形的中位线-【帮课堂】2022-2023学年八年级数学下册同步精品讲义(北师大版)(已下线)第六章 平行四边形 章末检测卷-2022-2023学年八年级数学下册重难题型全归纳及技巧提升专项精练(北师大版)
8 . 如图,在正方形
中,
是边
上一动点(不与
、
重合),对角线
、
相交于点
,过点
分别作
、
的垂线,分别交
、
于点
、
,交
、
于点
、
,下列结论:
①
;
②
;
③
;
④当
是
的中点时,
.
其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/a00920a5-bf66-4589-9dec-e30e1cd11475.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/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/dad2a36927223bd70f426ba06aea4b45.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c48a17f8cb89cf6bf4388b9f269c60b9.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebd0ea3041ca1f3d64fc640c64f8ed89.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1deb3ba2e791c88e551ca06ebccf6eb.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0472795db0e607e7cc9f246cf7dab5ef.png)
其中正确的结论有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/a00920a5-bf66-4589-9dec-e30e1cd11475.png?resizew=159)
A.![]() | B.![]() | C.![]() | D.![]() |
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22-23八年级下·江苏·期中
9 . 如图,在四边形
中,点E、F、G、H分别是
的中点,连接
.
是平行四边形;
(2)当对角线
与
满足什么关系时,四边形
是菱形,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d329b7ac2123f97b1043ecfb0a2e4e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
(2)当对角线
![](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)
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7卷引用: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)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)江苏省泰州市姜堰区第四中学、姜堰区南苑学校、姜堰区实验初级中学2022-2023学年八年级下学期期中联考试卷江苏省泰州市姜堰区2022-2023学年八年级下学期期中数学试题陕西省安康市汉阴县2022-2023学年八年级下学期期中数学试题(已下线)专题01 平行四边形(5种模型与解题方法)-【帮课堂】2023-2024学年八年级数学下册同步学与练(苏科版)(已下线)专题3-1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期中考点大串讲(人教版)(已下线)第9章 中心对称图形——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(苏科版)
名校
10 . 如图,在
中,
,D,E分别是边
的中点,
,点F在
的延长线上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/15/e3ecb37c-0130-407b-868c-139d8e79bf76.png?resizew=125)
(1)求证:四边形
为菱形;
(2)连接
与
相交于点
,若
,求
的长.
![](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/62c6f95fb0f50d816861bc3a526aee76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb67f27bcda7681b19239a199b4c4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8946331b0a9d86e1a9c78797f3021455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff21fa5add663a1e31ab4bdf50bb6ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/15/e3ecb37c-0130-407b-868c-139d8e79bf76.png?resizew=125)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5970813395882e5ca6b0992e55bd1d2.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a218677618d971568f307f7f9fe26916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
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3卷引用:专题5.2.2 菱形的判定(知识要点+专项练习)-2022-2023学年八年级数学下册同步精品课堂(浙教版)
(已下线)专题5.2.2 菱形的判定(知识要点+专项练习)-2022-2023学年八年级数学下册同步精品课堂(浙教版)福建省福州第一中学2022-2023学年八年级下学期期中数学试卷山东省德州市临邑县2022-2023学年八年级下学期期末数学试题