如图,矩形
中,
为
上一点,
,动点F从点A出发沿射线
方向以每秒3个单位的速度运动.连
,过E作
的平行线交射线
于点H,设点F的运动时间为t(不考虑D,E,F在同一直线的情况).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/465cfd7a-701a-4d48-acc5-5091bdae3f92.png?resizew=520)
(1)当
时,试求出
的长.
(2)当F在线段
上时,设
面积为
周长为W.
①求S与t的函数关系式;
②当t为何值时,W有最小值.
(3)当
与
相似时,求t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9353ab08dee7af93e8ddf2e45d4346b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cbfaec1d9dcaaf159b060163436113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f46868b105d5ed53ec374a5bc1ee915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/465cfd7a-701a-4d48-acc5-5091bdae3f92.png?resizew=520)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c581dab991aeadf06d972e47673ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
(2)当F在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7926bcd23f0bf7ddca7a99263f4010bd.png)
①求S与t的函数关系式;
②当t为何值时,W有最小值.
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc5c12b241539cc99487865f7d8bf34.png)
23-24九年级上·湖南衡阳·期末 查看更多[3]
湖南省衡阳市华新实验中学2023-2024学年九年级上学期期末数学试题(已下线)专题05 图形与图形的变换(5大易错点分析+21个易错点+易错题通关)-备战2024年中考数学考试易错题(江苏专用)(已下线)易错07+图形的变化02(七大易错分析+举一反三+易错题通关)-备战2024年中考数学考试易错题+(全国通用)
更新时间:2024-03-17 18:04:41
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,图中数字代表正方形的面积,
,求正方形
的面积.(提示:直角三角形中,
角所对的直角边等于斜边的一半)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/2020/5/8/2458362675290112/2459418893262848/STEM/a4aab75f52ed47dc9c421d7b21625375.png?resizew=182)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】在△ABC中,∠ACB=90°,∠BAC=30°,D为AB的中点,四边形BCED为平行四边形,DE,AC相交于F.连接DC,AE.
(1)试确定四边形ADCE的形状,并说明理由.
(2)若AB=16,AC=12,求四边形ADCE的面积.
(3)当△ABC满足什么条件时,四边形ADCE为正方形?请给予证明.
(1)试确定四边形ADCE的形状,并说明理由.
(2)若AB=16,AC=12,求四边形ADCE的面积.
(3)当△ABC满足什么条件时,四边形ADCE为正方形?请给予证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/8/108a9857-17c3-4b14-8b03-035f0bab3b48.png?resizew=181)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】在矩形
中,点
是
上的一动点,
平分
,交
于点
,交
于点
,连接
.
(1)如图(1),若
,求证:
;
(2)如图(2),当点
是
的中点,
时.
①求证:
;
②求
的值.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e7106619c08f2bcc1d21f846e8a0de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/11/ee235f15-d746-411f-997f-3315a7d620dd.png?resizew=429)
(1)如图(1),若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce726bceb02452bb4e5ed6b00fa94e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2291de85a2a29ff360a4515cce99c804.png)
(2)如图(2),当点
![](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/53c51c25b65a37b676ae3c3b71c29f9b.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f66f5efdb68ef98abb8d232b54b0c9.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0255ce3e1ba26fca432dd4e3de6b1e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】(1)【问题原型】如图①,在
,
,
,求点
到
的距离.
(2)【问题延伸】如图②,在
,
,
.若点
在边
上,点
在线段
上,连结
,过点
作
于
,则
的最小值为______.
(3)【问题拓展】如图(3),在矩形
中,
.点
在边
上,点
在边
上,点
在线段
上,连结
.若
,则
的最小值为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8817091d0f4b7d7ac6df560cb63c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)【问题延伸】如图②,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eeb0c8df3d8c5260768c5e407b3583a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c8563c09abcd5e110aa93d2f03d7363.png)
(3)【问题拓展】如图(3),在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f504cd6d53cbf28a697d0ed5caf8fe6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a3e8100280df38c41d74a90db59216.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/1/6e2a4569-0af0-4fb5-bee7-0f746896176b.png?resizew=447)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图,
中,
,
分别为边
的点,
,
.
(1)用圆规和没有刻度的直尺在线段
上求作一点
,使
(两种工具分别只限使用一次,并保留作图痕迹 );
(2)在(1)的条件下,过点
作
交
于
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6c6426f8f8826f3f15e20fda9e1cfe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/1cdf9250-c322-4904-809c-15024340cede.png?resizew=327)
(1)用圆规和没有刻度的直尺在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a214600fa899ad3e56c1525a9aacb860.png)
(2)在(1)的条件下,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07c89f52555c00d8babd48b97ebd6af.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/348216467fda035329fe8fac46b39911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,AC//BD,AD和BC相交于点E,EF//AC交AB于点F,且AC=p,BD=q,EF=r.
![](https://img.xkw.com/dksih/QBM/2022/5/16/2980516536606720/2980610685116416/STEM/f7eb07a7eca94db4a0600bf5777a6398.png?resizew=164)
(1)求证:
;
(2)若AC=20,BD=80,试求EF的值.
![](https://img.xkw.com/dksih/QBM/2022/5/16/2980516536606720/2980610685116416/STEM/f7eb07a7eca94db4a0600bf5777a6398.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2ec22828c5b92e8fdaf7c9a8750736.png)
(2)若AC=20,BD=80,试求EF的值.
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐1】如图,在下列带有坐标系的网格中,
的顶点都在边长为
的小正方形的顶点上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/9a571298-2c37-4580-a386-13eb7185a9ad.png?resizew=221)
(1)请画出
关于
轴对称的图形(其中
分别是
、
、
的对应点,不写画法);
(2)直接写出
三点的坐标;
(3)平面内一点
关于直线
轴对称点的坐标为___________.
(4)若点
为
轴上动点,当
周长最小时,画出点
的位置(不写画法,保留作图痕迹).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/9a571298-2c37-4580-a386-13eb7185a9ad.png?resizew=221)
(1)请画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6386e1f590de54a691c86364d1eee8.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)
(2)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6386e1f590de54a691c86364d1eee8.png)
(3)平面内一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f66354ce8e0c81f3225f22e3dc347c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(4)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图,在平面直角坐标系中,点A(1,2),点B(4,1),点C(4,5).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/25/bf2d8b88-b152-400b-9693-82f2cf4db567.png?resizew=221)
(1)画出△ABC关于y轴的轴对称图形△A1B1C1,并写出点C的对称点C1的坐标;
(2)在x轴上画出点P,使PA1+PB1最小;
(3)直线MN∥y轴,与线段AB,AC分别交于点M,N(点M不与点A,C重合),若将△AMN沿直线MN翻折,点A的对称点为点A′,当点A′落在△ABC的内部时,点M的横坐标m的取值范围是 .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/25/bf2d8b88-b152-400b-9693-82f2cf4db567.png?resizew=221)
(1)画出△ABC关于y轴的轴对称图形△A1B1C1,并写出点C的对称点C1的坐标;
(2)在x轴上画出点P,使PA1+PB1最小;
(3)直线MN∥y轴,与线段AB,AC分别交于点M,N(点M不与点A,C重合),若将△AMN沿直线MN翻折,点A的对称点为点A′,当点A′落在△ABC的内部时,点M的横坐标m的取值范围是 .
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐3】早在古罗马时代,传说亚历山大城有一位精通数学和物理的学者,名叫海伦.一天,一位罗马将军专程去拜访他,向他请教一个百思不得其解的问题:将军每天从军营A出发,先到河边饮马,然后再去河岸同侧的军营B开会,应该怎样走才能使路程最短?这个问题的答案并不难,据说海伦略加思索就解决了它.从此以后,这个被称为“将军饮马”的问题便流传至今.大数学家海伦是用轴对称的方法巧妙地解决了这个问题.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/464b6382-82bf-4966-8cbf-b2fece08b444.png?resizew=122)
如下图,作B关于直线l的对称点
,连接AB与直线l交于点C,点C就是所求的位置.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/c79cf779-e3f6-4d80-b3ca-571fb0893938.png?resizew=124)
证明:如下图,在直线l上另取任一点
,连接
,
,
,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/8472c1cb-ca5a-45f7-8345-0c7593b9a288.png?resizew=151)
∵直线l是点B,
的对称轴,点C,
在l上,
∴
,
,
∴
______=______.
在
中,∵
,
∴
即
最小.
本问题实际上是利用轴对称变换的思想,把A,B在直线同侧的问题转化为在直线的两侧,从而可利用“两点之间线段最短”,即“三角形两边之和大于第三边”的问题加以解决(其中C在
与l的交点上,即A、C、
三点共线).本问题可归纳为“求定直线上一动点与直线外两定点的距离和的最小值”的问题的数学模型.
【简单应用】
(1)如下图,在等边
中,
,
,E是AC的中点,M是
上的一点,求
的最小值;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/46822732-23aa-48ab-a57b-4a95ef07f8b4.png?resizew=144)
(2)如下图,在四边形
中,
,
,在
上分别找一点M、N当
周长最小时,求
的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/d1511da5-211c-4781-addc-c818f38c410e.png?resizew=117)
【拓展应用】
如下图,是一个港湾,港湾两岸有A、B两个码头,
,
千米,
千米,现有一艘货船从码头A出发,根据计划,货船应先停靠
岸C处装货,再停靠
岸D处装货,最后到达码头B.怎样安排两岸的装货地点,使货船行驶的水路最短?请画出最短路线并求出最短路程.(注:在直角三角形中有直角边的平方和等于斜边的平方,如图即在直角
中,有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3133ef62aad6bdd6637140620f068fad.png)
)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/464b6382-82bf-4966-8cbf-b2fece08b444.png?resizew=122)
如下图,作B关于直线l的对称点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/c79cf779-e3f6-4d80-b3ca-571fb0893938.png?resizew=124)
证明:如下图,在直线l上另取任一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0f0ccc8492a0ccf1eee24867060643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e737bc35da650eda3825d29799b5f86f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/8472c1cb-ca5a-45f7-8345-0c7593b9a288.png?resizew=151)
∵直线l是点B,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9729be0ab0335b477ad4d2215138613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9820f6b97b9ec5b848830aaf5f21791.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5669111098a61ccbb72a03b421ea93.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927c7ad4e25692d65a9168c48f34f211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86de960db4fa7d43db021345db44fb18.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aabc302bd25b0562b0ae921a561cd5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb9072d41640eda397474584bf6e6dc9.png)
本问题实际上是利用轴对称变换的思想,把A,B在直线同侧的问题转化为在直线的两侧,从而可利用“两点之间线段最短”,即“三角形两边之和大于第三边”的问题加以解决(其中C在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943712a5e96b16cc15d775cc4687237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
【简单应用】
(1)如下图,在等边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c9acf72ea00d2b870041b35f2ecef3b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/46822732-23aa-48ab-a57b-4a95ef07f8b4.png?resizew=144)
(2)如下图,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd5bbbbe6603e98b0b08bd38b2d6cca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59281d3136f2c67c078d98842171224d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8dbf16d3adcc74fbea454665bc66ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89d17e21531b6721aa109c6a91146c84.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/d1511da5-211c-4781-addc-c818f38c410e.png?resizew=117)
【拓展应用】
如下图,是一个港湾,港湾两岸有A、B两个码头,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6131160eaee962470abc7771df265c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a99044cdedf9e67bffd16a7eeeadf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3133ef62aad6bdd6637140620f068fad.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/d50dfe6f-0c40-44a6-8b87-4d52da207df6.png?resizew=128)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/26/bd833761-7958-46be-b5a3-c30d3c5ecd6b.png?resizew=152)
您最近一年使用:0次