名校
1 . 如图,在
中,
,
,
,对角线
与
交于点O,将直线l绕点O按顺时针方向旋转,分别交
、
于点E、F,则四边形
周长的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
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2024-05-14更新
|
291次组卷
|
9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江苏省扬州市江都区实验初级中学2022-2023学年八年级下学期3月月考数学试题江苏省扬州市2023-2024学年八年级下学期3月月考数学试题江苏省扬州市宝应县2023-2024学年八年级下学期第一次月考数学试题(已下线)专题18.40 平行四边形题型分类专题(旋转问题)(分层练习)-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)广东省江门市福泉奥林匹克学校2023-2024学年八年级下学期月考数学试题湖北省孝感市高新区2023-2024学年八年级下学期期中数学试题(已下线)第六章第5讲 解题技巧专题:平行四边形中折叠、旋转、线段最值问题(4类热点题型讲练)-【帮课堂】2023-2024学年八年级数学下册同步学与练(北师大版)(已下线)2023—2024学年名校期末好题汇编(人教版八年级数学下册)——专题三—平行四边形和三角形的中位线
2 . 如图,
是
的角平分线,
,垂足为
,
交
的延长线于点
,若
恰好平分
,
,给出下列四个结论:①
;②
;③
;④
,其中正确的结论共有___ 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe446a0456e9168028baee032d8d7d23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d786ee723231d4ca87eb9d011a378b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d0d6dc13cf6b6d1a0e0c1d55ad0ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faabc484ce3666706c1beffda4bcfe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9953b7b5c647641edbec4c2ab90a65f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0903285efdf829ddedf887a9218e2c41.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/a5bc082f-644a-4485-ae8f-d4238c8b0bd0.png?resizew=171)
您最近一年使用:0次
3 . 如图,已知正方形
的面积为 16,正方形
的面积为 9,点 D、C、G、J、I 在同一水平面上, 则正方形
的面积为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7cefa14a90337bbbb6e378d8a892d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f38bd9acf0139be03b2a0afe2417bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/14/5c6ea3aa-1c62-40ff-80cf-6f282e8c5ff0.png?resizew=215)
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4 . 如图,在
中,
,
,
,
是以点
为直角顶点的等腰直角三角形,连接
,则
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4a514e2e338c6fa31c9938624a4a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/5f3d1060-e896-4ad7-a4e0-6047235688ae.png?resizew=113)
您最近一年使用:0次
5 . 如图,在
中,
平分
,
,
的面积为
,
的面积为
,则
的面积等于______ .
![](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/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/339023d8-d75d-4a30-9f47-d814336446e3.png?resizew=239)
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6 . 如图,在等边三角形
中,
,点O在
上,且
,点D和点E分别在
,
上,
,
,则
的长是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348216467fda035329fe8fac46b39911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72d83915b41102495fcff91dbdbb0b5.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/870db8090d5c4d194c25cf1355968f29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7da595406d89ce8a442ee27a12eec9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/28/cf9aa169-7655-4fde-9695-e53b54fb7097.png?resizew=159)
您最近一年使用:0次
7 . 如图,在矩形
中,
,点
为
边上的动点,连接
,将线段
绕点
顺时针旋转
,点
落在点
处,当点
在矩形
外部时,连接
.若
为直角三角形,则
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8db33f8c458c9fc0e35f5b1df4843ba.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c031952601f5e4f1837f2c281720fbec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5d0162d0ee5286bf0f1996d7180382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/ce5ab74f-3da6-4666-94b4-09fda6194952.png?resizew=180)
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名校
8 . 如图;
的面积为
,
垂直
的平分线
于P,则
的面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9202af84bc055b58bd51fae5e3272283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
您最近一年使用:0次
2024-02-26更新
|
100次组卷
|
21卷引用:河南省洛阳市偃师市2018-2019学年八年级上学期期末数学试题
河南省洛阳市偃师市2018-2019学年八年级上学期期末数学试题河南省南阳市淅川县2023-2024学年八年级上学期期末数学试题(已下线)【新东方】初中数学1218初二上(已下线)八年级数学期末考前必刷卷-2023-2024学年八年级数学上学期期末考点大串讲(苏科版)浙江省嘉兴市秀洲区三校共同体2020-2021学年八年级上学期月考数学试题(一)福建省莆田砺志学校2020-2021学年八年级上学期第一次月考数学试题江苏省钟吾初级中学2020-2021学年八年级上学期期中数学试题(已下线)专题12.15 角的角平分线的性质(巩固篇)(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)(已下线)12.3 角平分线的性质(培优三阶练)-2022-2023学年八年级数学上册课后培优分级练(人教版)(已下线)重难点01 全等三角形(5种模型)-2022-2023学年八年级数学上学期考试满分全攻略(浙教版)江苏省常州市金坛区金坛区第五中学2021-2022学年八年级上学期10月月考数学试题江苏省常州市新北区实验中学2022-2023学年八年级上学期第一次月考数学试题(已下线)专题1.39 角的角平分线的性质(巩固篇)(专项练习)-2022-2023学年八年级数学上册基础知识专项讲练(浙教版)江苏省扬州市邗江实验学校蒋王分校2022-2023学年八年级上学期第一次月度质量检测数学试题(已下线)江苏省泰州市姜堰区实验初级中学2023-2024学年八年级上学期数学独立作业一10.9江苏省常州市新北区新北区实验中学2023-2024学年八年级上学期9月月考数学试题浙江省台州市临海市大田初级中学2022-2023学年八年级上学期期中数学试题江苏省泰州市姜堰区姜堰区实验初级中学2023-2024学年八年级上学期10月月考数学试题浙江省宁波市鄞州区鄞州区十二校八年级段期中联考2023-2024学年八年级上学期期中数学试题福建省莆田市涵江区国欢镇中学2023-2024学年八年级上学期期中数学试题(已下线)专题01 三角形的证明(考点清单)-2023-2024学年八年级数学下学期期末考点大串讲(北师大版)
9 . 如图,在菱形
中,
,
,
交
于点
,
为
的中点,连接
并延长,交
于点
,点
为
的中点,连接
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0acaca7ce64a0f698cd854915fffc06.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb3d1070981fed5ca65a34bb2282e6f.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0acaca7ce64a0f698cd854915fffc06.png)
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10 . 如图,正方形
的边长为
,
分别是边
上的一点,将正方形
沿
折叠,使点
恰好落在
的中点
处,点
的对应点为点
,则折痕
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b998899dd2988d6adbcd1813482923.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18242c62e61c26e182f1b4f8db997759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/172d44a9-7343-4572-a07f-6b4c1115c759.png?resizew=165)
您最近一年使用:0次