1 . 如图,在
中,
,
,过点
作
交
的延长线于点
.三角尺
直角顶点为
,一条直角边
置于
边所在直线.
(1)当三角尺
直角边
经过点
时,如图1,请写出
与
数量关系,并说明理由?
(2)在图1中,将三角尺
沿
方向平移,使直角边
与
边相交于点
(不与
、
重合),且点
在
延长线上,如图2,作
于点
.请证明:
;
(3)在图(2)中,将三角尺
沿
方向继续平移,使点
在线段
上时,如图3,请写出
、
、
三者之间的数量关系,不必证明.
![](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/29edec1f0ccd57a096fa9ef344d23568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08361173b096d18b33210a955e109f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902f97913e1af1e6c793f7edfe6b2114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/abb89c80-e83b-46f1-a728-bdc026f9118e.png?resizew=544)
(1)当三角尺
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08361173b096d18b33210a955e109f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)在图1中,将三角尺
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08361173b096d18b33210a955e109f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b7c62ef20bdd7b6f1a5108864bc12d.png)
(3)在图(2)中,将三角尺
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08361173b096d18b33210a955e109f42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
2 . 如图,在
中,点
在
边上,作
,交
延长线于点
;作
,垂足为
,
.试问线段
是
的中线吗?为什么?
![](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/c897a54f2e36bc4b52fba74b41c89d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b62ce0cbffa4758c7a0e6fb7ca4d24e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f805768a5ffaf8bdfa4bc3b680aafdc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/bfcc63ff-c8a7-44a1-b458-be91c75d531c.png?resizew=193)
您最近一年使用:0次
3 . 如图,在
中,
,D是
边的中点,
交直线
于点E,请仅用无刻度的直尺,分别按照下列要求作图.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/cd01842d-5db8-4ee6-a4f5-fd3377d7ebb5.png?resizew=290)
(1)在图1中,过点C作
的垂线;
(2)在图2中,过点E作
的平行线.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/cd01842d-5db8-4ee6-a4f5-fd3377d7ebb5.png?resizew=290)
(1)在图1中,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)在图2中,过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
2023-05-12更新
|
152次组卷
|
4卷引用:江西省景德镇市2020-2021学年七年级下学期期末数学试题
江西省景德镇市2020-2021学年七年级下学期期末数学试题2023年江西省赣州市南康区中考一模数学试卷(已下线)江西省抚州市东乡区第二中学2022-2023学年九年级下学期6月月考数学试题(已下线)2023年江西一模(无刻度直尺作图)
名校
解题方法
4 . 如图,在△ABC中,∠A=100°,AB=AC,BE是∠ABC的平分线,求证:AE+BE=BC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/858ceed5-b256-4447-8cea-171a3f78ffba.png?resizew=248)
您最近一年使用:0次
2022-08-08更新
|
1634次组卷
|
8卷引用:江西省景德镇一中2021-2022学年七年级下学期期末考数学试卷(重点班)
江西省景德镇一中2021-2022学年七年级下学期期末考数学试卷(重点班)(已下线)专题12.46 《全等三角形》挑战综合(压轴)题分类专题(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)专题1.2 全等三角形相关辅助线五种方法 专项讲练-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(浙教版)(已下线)专题1.70 《三角形的初步知识》挑战综合(压轴)题分类专题(二)(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)(已下线)2022年浙江省龙湾区中考第二次适应性测试数学试卷变式题16-20(已下线)重难点03全等三角形中“截长补短”模型-【暑假自学课】2023年新八年级数学暑假精品课(苏科版)(已下线)第14讲 等腰三角形常用作辅助线的方法-【暑假自学课】2023年新八年级数学暑假精品课(人教版)(已下线)专题04 构造全等三角形的四种方法-【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(北京专用)
名校
5 . (1)如图,AC与BD交于点E,且AC=DB,AB=DC,求证:∠A=∠D.
(2)如图,AC=DB,∠A=∠D,求证:AB=DC.
(2)如图,AC=DB,∠A=∠D,求证:AB=DC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/10d7320a-5d0f-46e9-a7e7-aa35895ad991.png?resizew=369)
您最近一年使用:0次
名校
6 . 如图,在
中,
是边
边上中线,点M在边
上,点N在边
上,并且
,如果
,则
最大为___________ .
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/6405c61d4c45c746edd730be19c0dfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f2f5c32ca3d60c6583d92a5ab1aecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cbff84327e964f912a54032e76ccc9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/5adb0b82-fdde-4b9f-b76f-f567b713df2a.png?resizew=240)
您最近一年使用:0次
7 . 琪琪同学沿一段笔直的人行道行走,在由A处步行到达B处的过程中,通过隔离带的空隙O,刚好浏览完对面人行道宣传墙上的社会主义核心价值观标语,其具体信息汇集如下:如图,
,相邻两平行线间的距离相等,AC,BD相交于O,
.垂足为D,已知
米,请根据上述信息求标语CD的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee15e19d6cfde4ec146390b8dcc83d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de766cb61f7a291b168a32138c9291a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae002c63b493d2b1d72ced0f85537c51.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/19/fb33d8a0-8c11-4f71-96bb-4dfabcb8a787.png?resizew=379)
您最近一年使用:0次
8 . 如图,桌面上竖直放置一等腰直角三角板ABC,若测得斜边AB在桌面上的投影DE为8cm,且点B距离桌面的高度为3cm,则点A距离桌面的高度为( )
![](https://img.xkw.com/dksih/QBM/2017/7/10/1727234283307008/1732304283860992/STEM/00ddbb3e3fb94f308161fc49dc5c1255.png?resizew=167)
![](https://img.xkw.com/dksih/QBM/2017/7/10/1727234283307008/1732304283860992/STEM/00ddbb3e3fb94f308161fc49dc5c1255.png?resizew=167)
A.6.5cm | B.5cm | C.9.5cm | D.11cm |
您最近一年使用:0次
9 . 如图,C、F在BE上,∠A=∠D,AB∥DE,BF=EC.
![](https://img.xkw.com/dksih/QBM/2013/5/22/1573655245160448/1573655251222528/STEM/9316de01d05c4c809a1c9cb3000873bb.png)
求证:AB=DE.
![](https://img.xkw.com/dksih/QBM/2013/5/22/1573655245160448/1573655251222528/STEM/9316de01d05c4c809a1c9cb3000873bb.png)
求证:AB=DE.
您最近一年使用:0次
11-12八年级上·全国·课后作业
名校
10 . 如图,已知△ABC中,AB=AC,∠A=100°,BD平分∠ABC,求证:BC=BD+AD.
![](https://img.xkw.com/dksih/QBM/2012/11/30/1573563249975296/1573563267809280/STEM/9ab7e262abce4ce1bcb31c349f233d04.png?resizew=199)
您最近一年使用:0次