2023九年级上·全国·专题练习
名校
1 . 如图,在
中,
,连接
,以
为斜边在
的右侧作等腰直角
,P是
边上的一点,连接
和
,当
,则
长为 ____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58443377b033d65b50e502bc796d4962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/068e62c79ff7a527ff494db199d40b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
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6卷引用:24.4(培优课)辅助圆、隐圆(题型精讲精练)-【题型分类精粹】2023-2024学年九年级数学上学期期中期末复习讲练系列【考点闯关】(人教版)
(已下线)24.4(培优课)辅助圆、隐圆(题型精讲精练)-【题型分类精粹】2023-2024学年九年级数学上学期期中期末复习讲练系列【考点闯关】(人教版)(已下线)重难点06几何最值问题(5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(全国通用)2023年辽宁省抚顺市新抚区中考数学模拟预测题(四)(已下线)重难点04隐圆问题(三种模型解读+典例剖析+培优争分练)-2024年中考数学【热点·重点·难点】专练(安徽专用)(已下线)培优冲刺01 三角形中的常见模型综合训练(14模型)-【查漏补缺】2024年中考数学复习冲刺过关(全国通用)2024年广东省广州市越秀区铁一中学中考三模数学试题
2 . 已知:在
中,
.过
边上的点D作
,垂足为点E.
为
的一条角平分线,
为
的平分线.
,点G在边
上且不与点B重合.
①判断
与
的数量关系,并说明理由;
②判断
与
的位置关系,并说明理由;
(2)如图2,若
,点G在边BC上,DG与FB的延长线交于点H,用含
的代数式表示∠H,并说明理由;
(3)如图3,若
,点G在边
上,
与
交于点M,用含
的代数式表示
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2cf0e95fdf1fd8a5b01d3dfd905e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
①判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
②判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8f887360a533f0a25b0b34fb11f0a1.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708d48b595c17d4dccf9b4086d7e664e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708d48b595c17d4dccf9b4086d7e664e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2884b46c0b3b258154b393777e966a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/474d8c089759922188afc889fe7d67cd.png)
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9卷引用:江苏省徐州市沛县2022-2023学年七年级下学期期末数学试题
江苏省徐州市沛县2022-2023学年七年级下学期期末数学试题(已下线)专题01 与三角形的角有关的计算(30题)-【帮课堂】2023-2024学年八年级数学上册同步学与练(人教版)江苏省扬州市江都区八校联谊2023-2024学年七年级下学期数学第一次月考试题(已下线)专题02 三角形与多边形(六大题型)-备战2023-2024学年七年级数学下学期期末真题分类汇编(苏科版)(已下线)第7章 平面图形的认识(二)易错(11个考点40题专练)-2023-2024学年七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)(已下线)第7章 平面图形的认识(二)压轴大题(9个考点40题专练)-2023-2024学年七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)(已下线)江苏省七年级下学期期中真题必刷压轴60题(32个考点专练)-2023-2024学年七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)(已下线)七年级期末考前必刷卷-2023-2024学年七年级数学下学期期末考点大串讲(苏科版)(已下线)北师大七年级下学期期末真题必刷压轴60题(13个考点专练)-2023-2024学年七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(北师大版)
2024七年级下·上海·专题练习
3 . 对于平面内的
和
,若存在一个常数
,使得
,则称
为
的
系补周角.如若
,
,则
为
的6系补周角.
,则
的4系补周角的度数为___________![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)在平面内
,点
是平面内一点,连接
,
.
①如图1,
,若
是
的3系补周角,求
的度数.
②如图2,
和
均为钝角,点
在点
的右侧,且满足
,
(其中
为常数且
,点
是
角平分线
上的一个动点,在
点运动过程中,请你确定一个点
的位置,使得
是
的
系补周角,并直接写出此时的
值(用含
的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a742abf1b0702125a0c77cbfbef118ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bfa0bbe05b01453e6ed15d74da2602.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9870249d8564576a788fa11a3692e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bfa0bbe05b01453e6ed15d74da2602.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a742abf1b0702125a0c77cbfbef118ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbbf59ea22f2df8655052fa83129a21a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7369f524ee35ee1f4694aca79f99816e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86bfa0bbe05b01453e6ed15d74da2602.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a742abf1b0702125a0c77cbfbef118ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0283a1605ad22a83909fd869d154c709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9c1e0c3cab6b7bb3229221f4310ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
(2)在平面内
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
①如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d4d00b86b2f067b902baf6e52f0faab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b871a762469393cdd22f15aa49ebb8f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
②如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d19f963f7c803bcfcbb265ec6d4304.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/78dc08610bc5c2a315828ed5dcbecf4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96d7e59cafddc9089bb868cb9200d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a27268da04c3d01e2fb0b5e57d91d9ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.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/6fbf1667b21a273bf5dd007d65eeda7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e8c257f5615d30660cef4157c6b273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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8卷引用:专题02相交线平行线(考点清单,知识导图+10个考点清单&题型解读)-2023-2024学年七年级数学下学期期末考点大串讲(沪教版)
(已下线)专题02相交线平行线(考点清单,知识导图+10个考点清单&题型解读)-2023-2024学年七年级数学下学期期末考点大串讲(沪教版)(已下线)上海市七年级下学期期末必刷压轴60题(14个考点专练)-2023-2024学年七年级数学下学期期末考点大串讲(沪教版)(已下线)第7章 平面图形的认识(二)压轴大题(9个考点40题专练)-2023-2024学年七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)(已下线)第7章 平面图形的认识全章高频考点专练(5种专练+14个题型+4个思想)-2023-2024学年七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)(已下线)专题02 相交线平行线(考题猜想,易错、好题7个考点50题专练)-2023-2024学年七年级数学下学期期末考点大串讲(沪教版)(已下线)暑假作业04 平行线模型及动态问题-【暑假分层作业】2024年七年级数学暑假培优练(北师大版)(已下线)暑假作业10 平行线的基本模型(知识梳理+5大题型+拓展突破)-【暑假分层作业】2024年七年级数学暑假培优练(苏科版)(已下线)北师大七年级下学期期末真题必刷压轴60题(13个考点专练)-2023-2024学年七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(北师大版)
4 . 如图,在正方形
中,
,点E是边
上的点,且
,点F是对角线
所在直线上一点且
.过点F作
,边
交直线
于点G,则
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377f5c10cf527c87ab06bff61384f7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a586f7a419f014dc60be76b7a6f94f99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb82d530e7beb05bac20af46fd2f3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7101beb36f434347d1e275301c99bb7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d87448e09eaa816e50ae92d111d5ded6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ea03277f8408fabe5b327cc34838f.png)
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3卷引用:辽宁省沈阳市铁西区2023-2024学年八年级上学期期末数学试题
2024八年级下·江苏·专题练习
5 . 问题情境:苏科版八年级下册数学教材第94页第19题第(1)题是这样一个问题:
如图1,在正方形
中,点
、
分别在边
、
上,且
,垂足为
.那么
与
相等吗?
(1)直接判断:
(填“
”或“
”
;
在“问题情境”的基础上,继续探索:
问题探究:
(2)如图2,在正方形
中,点
、
、
分别在边
、
和
上,且
,垂足为
.那么
与
相等吗?证明你的结论;
问题拓展:
(3)如图3,点
在边
上,且
,垂足为
,当
在正方形
的对角线
上时,连接
,将
沿着
翻折,点
落在点
处.
①四边形
是正方形吗?请说明理由;
②若
,点
在
上,
,直接写出
的最小值为 .
如图1,在正方形
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4e22ba3e6e1c1d6b12d9b8baa8d1f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(1)直接判断:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411837b4b3078d05b43cb0439259a362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
在“问题情境”的基础上,继续探索:
问题探究:
(2)如图2,在正方形
![](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/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/de97dfb4a50e1e852ac0d09c3605d1ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
问题拓展:
(3)如图3,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13c4a875c62b36bcc95d629b780d8ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8bd01cd837bc582032269ea383200b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d955d197e2ecbfe724570663efcf2a2d.png)
①四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30d09f94375ccaa86d3a84f2223f2a8b.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24fac194a8e19414b66cae95c8f1a110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619cdd68b71e589179d56621073701e6.png)
您最近一年使用:0次
7日内更新
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158次组卷
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4卷引用: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)
(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)(已下线)第9章 中心对称图形-平行四边形 全章高频考点专练(4种专练+10个题型+3种思想)原卷版(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)暑假作业06 正方形性质与判断(5大题型巩固提升练+拓展能力练+仿真考场练)-【暑假分层作业】2024年八年级数学暑假培优练(人教版)
6 . 在学完有关中点的复习课后,陈老师带领同学们探究这样一道几何题:正方形
和正方形
共顶点A,连接
,取
的中点M,连接
.试探究
的形状.
以下是智慧小组的探究过程.
【特例探究】如图1,点G在边
上.
是等腰直角三角形,并给出了如下证明思路:
从M是
的中点入手,延长
交
于点N,如图2.
,得到
,
.
由于
,
,故
________.
所以
是________.
再结合M是
的中点从而可得结论.
(1)横线处应填:________,________.
【类比探究】
(2)如图3,将正方形
绕点A旋转,其他条件不变,在旋转过程中,试探究
的形状是否发生变化,并就图3的情形说明理由.
(3)在(2)的条件下,已知
,
,当点A,G,M在同一条直线上时,请直接写出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/050370ba202f5802cf19a371d3cb116d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a690101e5595786c62946c4b29b665f4.png)
以下是智慧小组的探究过程.
【特例探究】如图1,点G在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a690101e5595786c62946c4b29b665f4.png)
从M是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9e953a4a5f98c96bbe67cbaadf76d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02f72f2bc5969ac21b34b0bfe8ea23e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/031676fa40a8a376eaa1a1c3a4c22c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350fb9c57b7802bd0e90baa3d4b60a5e.png)
由于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c1dfc78642403761629836868da743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/478d8cdad9506e889570ca6618a49615.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b8358533955a34c35db8b8045b4135.png)
再结合M是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a459f78e4a3516d8a8535290ede7f386.png)
(1)横线处应填:________,________.
【类比探究】
(2)如图3,将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d0e8404f347a0eb4c76f4d25d9bdac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a690101e5595786c62946c4b29b665f4.png)
(3)在(2)的条件下,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6cee83d36c4da913e0790e5070c46f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
您最近一年使用:0次
7 . 综合与实践
问题情境:
在一节几何探究课上,老师提出这样一个问题:在正方形
中,E是对角线
上一点,以
为一边作正方形
,点F恰好在
边所在的直线上,连接
,求证:
.
观察思考:
(1)如图1,当点F在
边上时,请解答老师提出的问题.
探索发现:
受到老师的启发,综合与实践小组的同学进一步探究:H是
的中点,连接
.
(2)如图2,在图1的基础上,试猜想
与
的数量关系和位置关系,并说明理由.
(3)当E是
的三等分点,
时,请直接写出
的长.
问题情境:
在一节几何探究课上,老师提出这样一个问题:在正方形
![](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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/343f75b2c5479c279abca2faed278901.png)
观察思考:
(1)如图1,当点F在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
探索发现:
受到老师的启发,综合与实践小组的同学进一步探究:H是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4296b123572415bd10132371adec8d07.png)
(2)如图2,在图1的基础上,试猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
(3)当E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
您最近一年使用:0次
8 . 如图,四边形
是矩形纸片,
.对折矩形纸片
,使
与
重合,折痕为
;展平后再过点B折叠矩形纸片,使点A落在
上的点N,折痕
与
相交于点Q;再次展平,连接
,
,延长
交
于点G.有如下结论:①
;②
;③
;④
是等边三角形;⑤点P为线段
上一动点,点H是
的中点,则
的最小值是
.其中正确结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f17b72caf8dfd80ddce80937781f8871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5564681937f41e1489d69b20a71f9222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd1eec8634d0b05905ad8888ef1f0c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234cdeeee94033501fca6596894f7b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d1d30450eeeafbb0f3021d53b580a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
A.5个 | B.4个 | C.3个 | D.2个 |
您最近一年使用:0次
9 . 我们知道,点动成线,就是一条直线由无数个点组成的.在平面直角坐标系
中,一条直线上的所有的点的横、纵坐标都满足一个固定的关系式,反过来,如果一个点的横、纵坐标满足这个关系式,那么这个点就在这条直线上.如果一个点在一条直线上,我们称这个点是这条直线的“在线点”.
如图,在平面直角坐标系
中,直线
上任意一点
的横、纵坐标都满足
.例如:点
的横、纵坐标满足
,所以点
是直线
的“在线点”.
的直线
的“在线点”的坐标为 ;
(2)判断点
是否是直线
的“在线点”,并说明理由;
(3)在平面直角坐标系
中,将三角形
平移得到三角形
,点
、
、
的对应点分别是点
、
、
,它们的坐标如下表:
其中,点
在第一象限,且是直线
的“在线点”,
.
①若点
是直线
的“在线点”,且三角形
的面积为
,求
的值;
②若点
在
轴上,判断点
是否是直线
的“在线点”,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
如图,在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9aa1d34d66a6876aa0566c8fc8b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89d3cfabc41b9bf6ec8f07c2a00c9fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59094aef73d98d4d6a48f9c6b8d059f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89d3cfabc41b9bf6ec8f07c2a00c9fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)判断点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858f02895ac77ae5d33c485f0183f830.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(3)在平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
三角形![]() | ![]() | ![]() | ![]() |
三角形![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
①若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0874f019492261eb175bdcc08c189d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
10 . 如图,在
中,
,
,将射线
绕点
顺时针旋转
得到射线
,射线
与直线
的交点为点
.在直线
上截取
(点
在点
右侧),将直线
绕点
顺时针旋转
所得直线交直线
于点
.
与点
重合时,补全图形并求此时
的度数;
(2)当点
不与点
重合时,依题意补全图2,用等式表示线段
与
的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fae4870ceb2361ec41dff36651c5f9c.png)
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