如图,△ABC是等边三角形,点D,E,F分别是AB,BC,CA上的点.
(1)若AD=BE=CF,问△DEF是等边三角形吗?试证明你的结论;
(2)若△DEF是等边三角形,问AD=BE=CF成立吗?试证明你的结论.
(1)若AD=BE=CF,问△DEF是等边三角形吗?试证明你的结论;
(2)若△DEF是等边三角形,问AD=BE=CF成立吗?试证明你的结论.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/7/e228c27d-3ed5-4bc9-ab15-2dca41239f29.png?resizew=182)
17-18八年级下·江西·单元测试 查看更多[10]
2017-2018学年八年级数学北师版下册单元测试题 第1章 三角形的证明上海市重点中学2021-2022学年七年级下学期期末数学试题新疆维吾尔自治区和田地区和田县2021-2022学年八年级上学期期中数学试题(已下线)核心考点05 等腰三角形-【满分全攻略】2022-2023学年七年级数学下学期核心考点+重难点讲练与测试(沪教版)(已下线)上海七年级下期末真题精选(常考60题25个考点专练)-【满分全攻略】2022-2023学年七年级数学下学期核心考点+重难点讲练与测试(沪教版)(已下线)专题03三角形(考点清单,知识导图+12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常考60题(26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)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)专题06等腰三角形(6大题型)【好题汇编】-备战2023-2024学年七年级数学下学期期末真题分类汇编(上海专用)(已下线)专题03 三角形(考题猜想,易错、好题精选11个考点60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)
更新时间:2018-04-03 17:51:01
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
,
于点D,点E在
边上,且
,
分别交
于点E、F.
,
,求
的长;
(2)如图1,若
,试判断
与
的数量关系,并说明理由.
(3)如图2,若
,求证:
.
![](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/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78ee2cb6caf7d7ee877796d18e53907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97bde5efa645a4c1ed6874088400d6a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f25936291abb6432ed5a710ebf0ea195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ebb33adb2310a6e03918761e68204a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(2)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69dac71d59aeed03c5f9dc990c722e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(3)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4474c82ae786e175b5e603b81bc8018d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a44617c211d92f3bb1cc606a78ce9e.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,
于E,
于F,若
、
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/186bd22b-bbe2-4979-9151-a57d3686e8cc.png?resizew=189)
(1)求证:
;
(2)已知
,
,求AB的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c74790a3e99cbc484dd4e92f2aa056f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2dbcb9aba9056d7c82894342374a253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ea6d39197c8f7159c37644f2f0fc78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64e9b7b9f03c429f0ef16c3732ad9afd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/186bd22b-bbe2-4979-9151-a57d3686e8cc.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b31437017a5cc0015ba4a1f5b3cc9f5.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565f5ccfc4dbebd3d496c620503ccc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d9a53b2803588d25a4d1a81db555cc.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐3】如图1,
,
,以A点为顶点、
为腰在第三象限作等腰
,
(2)如图2,P为y轴负半轴上一个动点,当P点向y轴负半轴向下运动时,以P为顶点,
为腰作等腰
,过D作
轴于E点,求
的值;
(3)如图3,已知点F坐标为
,当G在y轴的负半轴上沿负方向运动时,作
,始终保持
,
与y轴负半轴交于点
,
与x轴正半轴交于点
,当G点在y轴的负半轴上沿负方向运动时,以下两个结论:①
为定值;②
为定值,其中只有一个结论是正确的,请找出正确的结论,并求出其值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9774f83067ed956a551bc41adcce0469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9466d03bc916a9169eaf39863d59fceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
(2)如图2,P为y轴负半轴上一个动点,当P点向y轴负半轴向下运动时,以P为顶点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee377cb61611847969e397a14d638e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d84acd3c96e20c0ce064aac125f7fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8292fede29edf8cbcf58fe11dda41556.png)
(3)如图3,已知点F坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0850448be9af50398a6e1122b7f798a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0bc8af36b3a7266c201508f1324cd72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f39acc5e75cfe118908c424d8dca175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09137d58e7898f6b1f31d2157e109b88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2cff2550c57a33386d9d3a806dd3a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72850427e83ff19a24305783e080b280.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,直线
交
轴于点
,交
轴于点
,直线
与
轴交于点
,
,动点
从点
出发,以3个单位长度/秒的速度沿边
向终点
匀速运动. 以
为一边作
. 点
在射线
上,以线段
为边在线段
左侧作菱形
,点
在
轴上,设点
的运动时间为
(秒)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/934a7090-cae5-4451-94ad-56bda38b1928.png?resizew=509)
(1)PQ长__________(用含有
的代数式表示);
(2)当点
落在边
上时,求
值;
(3)当直线
将菱形
分为面积相等的两部分时,直接写出此时的
值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c34f23f45d511636fb46dc31913103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca63f5bc76eba52c536d0ad8e95c1c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c3cbaef6648895a366bf56f415b70ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07eb6c1698d373d9e579c06df31f05c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/934a7090-cae5-4451-94ad-56bda38b1928.png?resizew=509)
(1)PQ长__________(用含有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】已知△ABC是等边三角形,点D是AC的中点,点P在射线BC上,点Q在线段AB上,∠PDQ=120°.
(1)如图1,若点Q与点B重合,求证:DB=DP;
(2)如图2,若点P在线段BC上,AC=6,求AQ+PC的值.
(1)如图1,若点Q与点B重合,求证:DB=DP;
(2)如图2,若点P在线段BC上,AC=6,求AQ+PC的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/14/06a24514-a836-41ee-a8c0-da4de4ad4d70.png?resizew=400)
您最近一年使用:0次