23-24九年级上·北京·期末
1 . 在
中,
,
,点
为线段
延长线上一动点,连接
,将线段
绕点
逆时针旋转,旋转角为
,得到线段
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/356c4fd8-66e7-48bd-9662-2ee50a61bdba.png?resizew=357)
(1)如图1,当
时,
①求证:
;
②求
的度数;
(2)如图2,当
时,试判断
和
的数量关系,并说明理由;
(3)当
,
时,若
,
,求点
到
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2cf0e95fdf1fd8a5b01d3dfd905e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/356c4fd8-66e7-48bd-9662-2ee50a61bdba.png?resizew=357)
(1)如图1,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d63db51b20ebfe3c06c6117ecdd7cf.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf7cc67acfa50ef6b21d9aa379e604a.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d03f73bec20b60bc7608972607f5a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d03f73bec20b60bc7608972607f5a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05c8c20061f17a7b63cefb1848a8ad86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a53061fb10ef5f18c324970c0433ac1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
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2 . 如图,在等腰直角
中,
是
边上任意一点(不与
重合),将线段
绕点
逆时针旋转
得到线段
,连接
.
的度数;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b155af03382bb6236a7a4223b4f2cc10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0520e9675bc1b416e8b8f01eb69fd13.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/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c71730ec20f22e67a207a9d918c70511.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3db3f03c05b28155f9c0d31abfab198.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bacde1dd98c6d2d157bd48310cabf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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6卷引用:北京市朝阳区2023-2024学年九年级上学期期末数学试题
3 . 如图,等边三角形
,
与
关于射线
对称,点E为边
上一点.点F在
的延长线上,
.作点F关于直线
的对称点G,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/58d1257e-e09c-4fa4-bbc4-35c9b114d6de.png?resizew=137)
(1)依题意补全图形,并证明
;
(2)用等式表示
之间的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a9ec45721f7b4d1c99917ac0d970f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec7783549cf9dc0fc3589f3672005ea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d3d4307b9f64d8c99f864941f37874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/58d1257e-e09c-4fa4-bbc4-35c9b114d6de.png?resizew=137)
(1)依题意补全图形,并证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9e14cfad06cf894a019ed8d1929b972.png)
(2)用等式表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280f731112e7197449d3730401197152.png)
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4 . 在
中,
,过点C作射线
,使
(点
与点B在直线
的异侧)点D是射线
上一动点(不与点C重合),点E在线段
上,且
.
与
的位置关系是 ,若
,则
的长为 ;(用含a的式子表示)
(2)如图2,当点E与点C不重合时,连接
.
①用等式表示
与
之间的数量关系,并证明;
②用等式表示线段
,
,
之间的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffb952f86442845da723fd291564484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2766916fdcdc705536d15930fa3f309d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffb952f86442845da723fd291564484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a721be142468a7e44412c444ea0fc296.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffb952f86442845da723fd291564484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图2,当点E与点C不重合时,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
①用等式表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
②用等式表示线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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32卷引用:2022年北京西城区九年级二模考试数学试卷
2022年北京西城区九年级二模考试数学试卷北京景山学校2022~2023学年九年级上学期12月考数学试卷北京市首都师范大学附属中学第一分校2022—2023学年九年级上学期12月数学月考试卷北京市首都师范大学附属中学实验学校2022--2023学年九年级上学期10月阶段性测试数学试题北京市石景山区首都师范大学苹果园分校2022~2023学年九年级下学期统一练习数学试卷北京师范大学实验中学2022-2023学年九年级数学统测6试卷2023年北京市海淀区北京师范大学第三附属中学中考一模数学试题(已下线)黄金卷2-【赢在中考·黄金8卷】备战2023年中考数学全真模拟卷(北京专用)2023年北京师范大学附属中学中考三模数学试题(已下线)专题25 几何压轴题(共51题)-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(北京专用)北京市第十三中学分校2023~2024学年九年级下学期月考数学试题(已下线)2023年北京一模(几何综合)江苏省宿迁市崇文初级中学2023-2024学年九年级下学期3月月考数学试题(已下线)专题12.13 角的角平分线的性质(知识讲解)-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)2.4 线段、角的轴对称性(培优分阶练)-2022-2023学年八年级数学上册课后培优分级练(苏科版)(已下线)第2章 轴对称图形 章末检测卷-2022-2023学年八年级数学上册课后培优分级练(苏科版)(已下线)第十三章 轴对称 章末检测卷-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)(已下线)专题1.37 角的角平分线的性质(知识讲解)-2022-2023学年八年级数学上册基础知识专项讲练(浙教版)(已下线)专题2.3 轴对称图形(九大题型) 重难点题型-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)广东省惠州市大亚湾金澳实验学校2022-2023学年八年级上学期第一次考试数学试题(已下线)第一章 三角形的证明 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)(已下线)专题1.1 三角形的证明 重难点题型13个-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)(已下线)第一次月考押题预测卷(考试范围:第一、二章)-【帮课堂】2022-2023学年八年级数学下册同步精品讲义(北师大版)湖南省长沙市浏阳市2022-2023学年八年级上学期期末数学试题(已下线)第2章 轴对称图形全章复习攻略与检测卷(2个概念5个性质3个判定2个应用1个技巧3种思想)-【帮课堂】2023-2024学年八年级数学上册同步学与练(苏科版)(已下线)专题07等腰三角形的轴对称性(5个知识点8种题型2种中考考法)-【帮课堂】2023-2024学年八年级数学上册同步学与练(苏科版)云南省昆明市五华区云南大学附属中学2023-2024学年八年级上学期期中数学试题云南省昆明市云大附中一二一校区2023-2024 学年八年级上学期期中数学试题河南省商丘市睢阳区第五中学2023-2024学年八年级上学期12月月考数学试题江西省上饶市信州区2023-2024学年八年级上学期期末数学试题(已下线)第一章第07讲 解题技巧专题:利用等腰三角形的'三线合一'作辅助线(3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)第五章第05讲 解题技巧专题:利用等腰三角形的'三线合一'作辅助线与构造等腰三角形的解题技巧(6类热点题型讲练)(原卷版)
名校
解题方法
5 . 问题背景:
如图1:在四边形
中,
,
,
.
,
分别是
,
上的点,且
.探究图中线段
,
,
之间的数量关系.
到点
,使
.连接
,先证明
,再证明
,他的结论应是 ;(并写出证明过程)
探索延伸:
(2)如图2,若在四边形
中,
,
,
,
分别是
,
上的点,且
是
的二分之一,上述结论是否仍然成立,并说明理由.
如图1:在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21eb847a1722ed6e10e23c59d53fe7d3.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/4a9eb456c912e01458c19b06e83a5c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc180eda08edfb6d54eb04da7741f099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac09e961b25848c2860065aa8f577e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/382dcc8aa37ed16c588b41888c3906a7.png)
探索延伸:
(2)如图2,若在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2918cca32d61602120ac9a9e4904ddf3.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/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
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|
54卷引用:2015届北京市东城区九年级上学期期末考试数学试卷
2015届北京市东城区九年级上学期期末考试数学试卷(已下线)第08讲 三角形中的对角互补模型-【多题一解&一题多解】冲刺2023年中考数学满分应对方法与策略(全国通用)(已下线)重难点01全等三角形三种模型(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)2014-2015学年福建省南平市第三中学八年级上学期期中考试数学试卷2015-2016学年内蒙古鄂尔多斯伊克昭中学八年级上第一次月考数学卷江苏省无锡市光华中学2017-2018学年上学期第一次月考八年级数学试卷2017-2018学年度四川省资阳市安岳县八年级(上)期末数学试卷广东省深圳市龙岗区宏扬学校2017-2018学年七年级6月月考数学试题新疆生产建设兵团2018-2019学年八年级上学期期末考试数学试题新疆2018-2019学年八年级(上)期末数学试卷陕西省安康市初级中学2019~2020学年第一学期八年级数学月考试卷题江苏省扬州市高邮市2019-2020学年八年级上学期10月月考数学试题浙江省嘉兴市秀洲区、经开区七校联考2019-2020学年八年级11月阶段性质量检测数学试题湖北省孝感市孝昌县2018-2019学年八年级上学期期中数学试题新疆维吾尔自治区新疆兵团第一师阿拉尔中学2019-2020学年八年级上学期期末数学试题山东省临沂市兰陵县2018-2019学年八年级上学期期末数学试题浙江省嘉兴市秀洲区、经开区七校联考2019-2020学年八年级上学期期中数学试题河南省洛阳市宜阳县2018-2019学年八年级上学期期末数学试题重庆市巴南区七校共同体2020-2021学年八年级上学期第一次月考数学试题河南省洛阳市洛龙区第一实验学校2020-2021学年八年级上学期10月月考数学试题河南省长葛市2020-2021学年八年级上学期期中数学试题河南省上蔡县第一初级中学2020-2021学年度八年级上学期期末数学试题华师大版河南省鹤壁市淇滨区湘江中学2020-2021学年八年级上学期第三次月考数学试题山东省德州市禹城市2020-2021学年八年级上学期期末数学试题山东省东营市河口区(五四制)2020-2021学年七年级上学期期末数学试题(已下线)第11讲 全等三角形的基本模型-【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12.35 作辅助线证明三角形全等-截长补短(知识讲解)-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)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)(已下线)江苏省泰州市姜堰区第四中学2022-2023学年八年级上学期数学独立作业9.13湖北省武汉市汉阳区晴川初级中学2021-2022学年八年级上学期质检数学试卷(10月份) (已下线)专题15 半角模型证全等-【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)四川省资阳市安岳县李家初级中学2022-2023学年八年级上学期期中数学试题黑龙江省牡丹江市2022-2023学年八年级上学期期中考试数学试题福建省厦门市2022-2023学年八年级上学期10月数学质检试卷(已下线)浙江八年级上学期期中【压轴34题考点专练】-2022-2023学年八年级数学上学期考试满分全攻略(浙教版)黑龙江省牡丹江市第十五中学2022-2023学年八年级上学期期中考试数学试题辽宁省营口市大石桥市九校2022-2023学年八年级上学期期中质量检测数学试题山东省德州市临邑县万力学校2022-2023学年八年级上学期期中数学试题广西壮族自治区钦州市直初中2022-2023学年八年级上学期期末数学试题湖南省岳阳市岳阳县三校2022-2023学年八年级上学期期末联合测试数学试题湖南省益阳市安化县小淹镇三校2022-2023学年八年级上学期期末联考评估数学试卷(已下线)专题19 对角互补邻边相等的半角模型-【微专题】2022-2023学年七年级数学下册常考点微专题提分精练(北师大版)山东省菏泽市成武县2022-2023学年八年级上学期期末数学试题山东省聊城市运河联盟联考2023-2024学年八年级上学期第一次学情调研数学试题安徽省淮南市龙湖中学2023-2024学年八年级上学期月考数学试题山东省聊城市十八校联考2023-2024学年八年级上学期10月月考数学试题山东省德州市乐陵市朱集镇朱集中学2023-2024学年八年级上学期10月月考数学试题河北省张家口市宣化区2023-2024学年八年级上学期期中数学试题湖北省恩施市白杨坪镇熊家岩初级中学2023-2024学年八年级上学期第二次月考数学试题(A卷)山西省吕梁市汾阳市河汾中学2023-2024学年八年级上学期月考数学试题四川省泸州市江阳区江阳区习之学校2023-2024学年八年级上学期10月月考数学试题(已下线)猜想02全等三角形(5种解题模型专练)-2023-2024学年八年级数学上学期期末考点大串讲(人教版)山东省东营市河口区胜利第六十二中学2023-2024学年七年级上学期期中数学试题(已下线)八年级数学开学摸底考(福建专用)-2023-2024学年初中下学期开学摸底考试卷
名校
6 . 如图,
为等边三角形,
为
边上一点,
为
延长线上一点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/8bf2edbb-b330-4096-b69c-4aef4a8b02d0.png?resizew=128)
(1)若
为
的中点,连接
.
①补全图形;
②判断
的位置关系和数量关系,并证明.
(2)在(1)的条件下,点
关于直线
的对称点是
,连接
,若
,直接写出
的最小值.
![](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/60ef95894ceebaf236170e8832dcf7e3.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/d42218a68301d770accaaefb96b19f8a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/8bf2edbb-b330-4096-b69c-4aef4a8b02d0.png?resizew=128)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2cbf4832edc6cd70d551eb52c8b3c71.png)
①补全图形;
②判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2cbf4832edc6cd70d551eb52c8b3c71.png)
(2)在(1)的条件下,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9601d29de0a884953b039ee72f0158fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e7f748d88b4eadfd1643c6b31fdf08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9601d29de0a884953b039ee72f0158fe.png)
您最近一年使用:0次
名校
7 . 如图,
为
的直径,
,
分别切
于点
,
,
交
的延长线于点
,
的延长线交
于点
,
于点
.若
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/b8997ca3-65e9-4339-921f-9f36e442576f.png?resizew=142)
(1)求证:
;
(2)求
的半径长.
(3)求线段
的长.
![](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/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b3791f7eb4d33d52bf7a73c1b3e75f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb69568e92832bba80b96f0f29f38151.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a19338598965bb3856cdd0236bbf694.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/b8997ca3-65e9-4339-921f-9f36e442576f.png?resizew=142)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d31e92ea51f3c45adb6f94dcd7a5e3ec.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(3)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
您最近一年使用:0次
2023-12-28更新
|
228次组卷
|
2卷引用:北京市铁路第二中学2023-2024学年九年级上学期期中数学试题
名校
8 . 已知正方形
,将线段
绕点
旋转
(
),得到线段
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/5fe6e2e8-9510-4ee1-8c83-81f6220f73e7.png?resizew=244)
(1)如图1,当点
在正方形
的内部时,若
平分
,
,则
______°,四边形
的面积为______;
(2)当点
在正方形
的外部时,
①在图2中依题意补全图形,并求
的度数;
②作
的平分线
交
于点
.交
的延长线于点
,连接
.用等式表示线段
,
,
之间的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708d48b595c17d4dccf9b4086d7e664e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/5fe6e2e8-9510-4ee1-8c83-81f6220f73e7.png?resizew=244)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c44345de7d1f37b48def25db8c5e2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
①在图2中依题意补全图形,并求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4598486f8c5ac28b1165b76e78105979.png)
②作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79cd9d0d73549e2944578f3513631ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
您最近一年使用:0次
9 . 如图,
都是等边三角形,
与
交于点O,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e515787ebe97ed2662237d9ca51ea1.png)
____________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173c297fb8c270ca22f1eb3197350f3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e515787ebe97ed2662237d9ca51ea1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/3d89b667-b542-4d99-891f-76125b805876.png?resizew=147)
您最近一年使用:0次
10 . 如图,在
中,
,将
绕点
顺时针旋转
得到
,点
关于直线
的对称点为
,连接
交直线
于点
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/6ef79eee-0042-4def-817e-2c34f3bf59b9.jpg?resizew=63)
(1)根据题意补全图形;
(2)判断
的形状并证明;
(3)连接
,用等式表示线段
,
,
之间的数量关系,并证明.
![](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/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/6ef79eee-0042-4def-817e-2c34f3bf59b9.jpg?resizew=63)
(1)根据题意补全图形;
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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