名校
1 . 如图,边长为a的等边
中,
是
上中线且
,连接
,在
的右侧作等边
,则
周长的最小值是 ____________________ (用含a,b的式子表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16503a4116bade586609dad00f4ab1f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefe4a3e7a7fa195ed6a6712447639b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f15347d7870120325031b981affdac48.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/23/fab9a5ed-7a80-4583-9d52-acea7afe9505.png?resizew=138)
您最近一年使用:0次
2023-11-20更新
|
194次组卷
|
10卷引用:北京市海淀区建华实验学校2022~2023学年八年级上学期期中考试数学试卷
北京市海淀区建华实验学校2022~2023学年八年级上学期期中考试数学试卷(已下线)期中真题精选(压轴60题专练)-2022-2023学年八年级数学下学期期中期末考点大串讲(北师大版)江苏省扬州市竹西中学2023-2024学年八年级上学期10月月考数学试题江苏省扬州市直学校2023-2024学年八年级上学期10月月考数学试题湖南省岳阳市第十中学2023-2024学年八年级上学期期中数学试题福建省福州市外国语中学2023-2024学年八年级上学期期中数学试题福建省福州市格致中学等九校联考2023-2024学年八年级上学期期中数学试题广西壮族自治区南宁市兴宁区第三中学2023-2024学年九年级上学期期中数学试题辽宁省鞍山市千山区千山区教师进修学校2023-2024学年八年级上学期期中数学试题山东省临沂市临沭县第五初级中学2023-2024学年八年级12月月考数学试题
2 . 完成下列各题:
(1)问题情境 如图1,
和
都是等边三角形,连接
,
,求证:
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/f4043d75-1a5d-47c9-891b-b5bbcee12ea5.png?resizew=145)
(2)迁移应用 如图2,
和
都是等边三角形,A,B,E三点在同一条直线上,M是
的中点,N是
的中点,P在
上,
是等边三角形,求证:P是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/8535cc3c-bb7b-419b-bda7-482e5f3e0652.png?resizew=202)
(3)拓展创新 如图3,P是线段
的中点,
,在
的下方作等边
(P,F,H三点按逆时针顺序排列,
的大小和位置可以变化),连接
,
.当EF+BH的值最小时,直接写出等边
边长的最小值.
(1)问题情境 如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52273305805769a438772342b53c289e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/f4043d75-1a5d-47c9-891b-b5bbcee12ea5.png?resizew=145)
(2)迁移应用 如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/d23b488f961d9fde37feb7f5c497c0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/8535cc3c-bb7b-419b-bda7-482e5f3e0652.png?resizew=202)
(3)拓展创新 如图3,P是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2816811954311a2792b3bfaa7aecf81f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21871e06601d895874b1b8a49b1b808f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21871e06601d895874b1b8a49b1b808f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21871e06601d895874b1b8a49b1b808f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/5b78f6c6-7ab4-44d6-8029-c5f534383398.png?resizew=175)
您最近一年使用:0次
3 . 已知
中,
,
,D为
的中点,动点P从B出发沿
向C点方向运动,Q点从A出发沿
向终点C运动,若P的速度的2个单位/每秒,Q的速度的4个单位/每秒,运动时间的t秒.
(1)当运动时间的t秒时,则
______,
______(用含t的代数式表示);
(2)当
时,
与
全等吗?说明理由;
(3)若
的周长为18,问t为何值时
是等腰三角形?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f138deab9e5a4baaada287ed1a78df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/21/33fd4f1c-7497-4383-b77a-d2da94f5b160.png?resizew=225)
(1)当运动时间的t秒时,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9985eaef9e31b243d5aaf89b71f66075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1772209a569f87d0539b5d7871d0834.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983add910c8e09954f164a5e87d1f7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
您最近一年使用:0次
4 . 已知四边形
是正方形,
绕点
旋转
,
,
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/1/e64c2ac5-d462-4573-865f-3f13143ee6ac.png?resizew=453)
(1)如图
,求证:
;
(2)直线
与
相交于点
,
如图
,
于点
,
于点
,求证:四边形
是正方形;
如图
,连接
,若
,
,请直接写出在
旋转的过程中线段
长度的最小值.(提示:过点
作
于点
,过点
作
于点
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6aecf7be28564d26d7795f157bbc379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91f064bb73019053992fe781a53356a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faabc484ce3666706c1beffda4bcfe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/1/e64c2ac5-d462-4573-865f-3f13143ee6ac.png?resizew=453)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d4dc5f5fbf32e90c59f135506539dc9.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88583f8fb68d7158bedb4510279a0fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68bfc2d2fde52ed5f65824c182211109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6a3a9baec1572be5c3b15ac2dec9dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6370d6c626bdabf1fc694501ee6c714f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63780604c312cad707a673ece20dc77c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88583f8fb68d7158bedb4510279a0fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
解题方法
5 . 等腰直角
与等腰直角
的直角顶点
重合.
与
相交于
,
的延长线交
于
,连接
.
(1)如图1,求证:
;
(2)如图2,
,
,
在同一条直线上,取
的中点
,分别连接
,
,求证:
;
(3)如图3,过
作
的平行线,过
作
的平行线,两线相交于
,且点
在
的延长线上,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bc4672599da329642dd46717ae587e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/13/31304585-9be5-47c7-8e90-d6e0d8c0cbe7.png?resizew=208)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd7bfae5bd300c678dad3a8eb00adc65.png)
(2)如图2,
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca7859562bb375c604b9aae46a9bcc5.png)
(3)如图3,过
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dbbe0e92c25f2e8c5c552157a350acf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13340275ca97809c5789d4f70a9f185c.png)
您最近一年使用:0次
2023-10-12更新
|
285次组卷
|
5卷引用:2022年安徽省合肥省十校中考联考数学试题(三)
2022年安徽省合肥省十校中考联考数学试题(三)(已下线)专题4.10 图形的相似章末十大题型总结(拔尖篇)-2023-2024学年九年级数学上册举一反三系列(北师大版)(已下线)专题23.10 图形的相似章末十大题型总结(拔尖篇)-2023-2024学年九年级数学上册举一反三系列(华东师大版)(已下线)专题4.10 相似三角形章末十大题型总结(拔尖篇)-2023-2024学年九年级数学上册举一反三系列(浙教版)(已下线)专题22.10 相似形章末十大题型总结(拔尖篇)-2023-2024学年九年级数学上册举一反三系列(沪科版)
6 . 如图,已知正方形
的边长为3,P是对角线
上一点,
于点E,
于点F,连接
,
.给出下列结论:①
;②
一定是等腰三角形;③四边形
的周长为6;④
的最小值为
.其中正确结论的序号为________ .
![](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/ac2ef99db257cc1acb08e3a5e0006d49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/544204617f1eb4e26a082a72d27d0bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a8bf5ca1bb015cbd16139033f6614c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fbd6b9f85c086ac95562fe45e8d969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fce76109c3b574feaca9cd7029c2875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/f970ac1b-6b82-497d-923e-751111d5665e.png?resizew=123)
您最近一年使用:0次
2023-09-27更新
|
88次组卷
|
3卷引用:陕西省榆林市第十中学2023-2024学年九年级上学期第一次月考数学试题
名校
7 . 如图,在等腰直角
中,
,
,将线段
绕点
顺时针旋转
得到线段
,以
为边,在
左侧构造等腰直角
,
,其中
,
与
交于点
,连接
,
.
(1)求证:
;
(2)如图2,若点
,点
,点
在一条直线上,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/19bc7774144c164f7ebaeca54fa657e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb1aa7bc4a01962fc1297f17fa9128f.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc1a9ed724ceece5e56d21ac4a3213cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df34369163e511f14028168cb0b21186.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/7/05cd4e47-6562-4170-b0f1-1126382d1f69.png?resizew=433)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7105500b08c85e3752ff9168abb73a2c.png)
(2)如图2,若点
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
名校
8 . 如图1,等边
中,点D在
上,点E在
上,连接
,
交于点F,
.
(1)求
的度数;
(2)如图2,连接
,若
,求证:
;
(3)如图3,在(2)的条件下,将
沿
翻折交
于点G,过点C作
的垂线交直线
于点H,若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c8fb32ae05a9c1abd3374f5c5f7a999.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/11/22f0b149-b482-4d8c-a4d2-dc45e72d2bfe.png?resizew=498)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95ee1c8b8f17e6adfe29201544ee304c.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80125e48498ac9c548732e2af1b1758d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b490c01e3288ff5d22ff497d495fee0.png)
(3)如图3,在(2)的条件下,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64e0206b1814c35cc96bd2b6b12239a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
您最近一年使用:0次
2023-08-07更新
|
264次组卷
|
3卷引用:黑龙江省哈尔滨市萧红中学校2022-2023学年八年级上学期11月期中数学试题
黑龙江省哈尔滨市萧红中学校2022-2023学年八年级上学期11月期中数学试题黑龙江省哈尔滨市南岗区萧红中学2022-2023学年八年级上学期期中数学(五四制)试题(已下线)专题16.1 期中测试卷(拔尖)-2023-2024学年八年级数学上册举一反三系列(人教版)
9 . 如图,在直角坐标系中,点A的坐标为(1,0),以线段
为边在第四象限内作等边
,点C为x轴正半轴上一动点(
),连接
,以线段
为边在第四象限内作等边
,直线
交y轴于点E.下列结论正确的有( )个.
(1)
;
(2)
的度数随着点C位置的变化而改变;
(3)点E的位置不随着点C位置的变化而变化,点E的坐标是
;
(4)当点C的坐标为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490fe2472078065bcc7119df108192eb.png)
时,四边形
的面积S与m的函数关系式为S=
m2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/19/dd9c0694-498d-43c7-ab61-1b9f6ab93c3a.png?resizew=184)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f58c71287cc249f71b39f73e1efa09e.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/73636989e83905f8800a865c2b608c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2afa1a34e954591ded8e5f6fc11515da.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
(3)点E的位置不随着点C位置的变化而变化,点E的坐标是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c98e158432ea23915ed2db79dc4a7f7.png)
(4)当点C的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490fe2472078065bcc7119df108192eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd4f8eae8a1b586ab1e9c888f727bd6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ec13ca7115ccd73a9d793758f1c170.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/19/dd9c0694-498d-43c7-ab61-1b9f6ab93c3a.png?resizew=184)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
2023-05-10更新
|
113次组卷
|
3卷引用:山东省德州市乐陵市乐陵江山实验学校2022-2023学年八年级下学期第二次月考数学试题
山东省德州市乐陵市乐陵江山实验学校2022-2023学年八年级下学期第二次月考数学试题(已下线)专题08 一次函数与几何的综合四类题型-【好题汇编】备战2023-2024学年八年级数学上学期期末真题分类汇编(浙教版)江苏省无锡市仓下中学2023-2024学年八年级上学期12月月考数学试题
名校
10 . 在等边
中,
为射线
上一点,
是
外角的平分线,
,
于
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/f9a7801a-5eb7-4d92-9c96-df0ba47eca61.png?resizew=415)
(1)如图1,求证
;
(2)如图1,若点
在线段
上(不与
,
点重合),求证:
;
(3)如图2,若点
在线段
的延长线上,(2)中的结论是否仍然成立?请说明理由.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d40d5cb59338d3cb1dd504bb12d107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/f9a7801a-5eb7-4d92-9c96-df0ba47eca61.png?resizew=415)
(1)如图1,求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28971fe3e3f9d3849400e98b46fc3ba.png)
(2)如图1,若点
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f56245f57518983e0d8a9ee8dc1dcb.png)
(3)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
2023-02-24更新
|
515次组卷
|
2卷引用:广东省广州市黄埔区2022-2023学年八年级上学期期末数学卷