1 . 山西的饮食文化以面食文化为主,常见的面食品种有刀削面、刀拨面、剔尖等等,同时山西人也会自制一些其他面食,比如利用“杠杆原理”压制出来的饸饹面本是西北常见的一种面食,山西人也会经常吃.如图①,是一个手动饸饹机的实物图,图②是其示意图,已知手柄的长度
,
,支架的高度
,抬至最高时与水平方向的夹角
约为
,此时点
,
,
,
四点共线.
(结果精确到
,参考数据:
,
,
)
到水平面
的距离;
(2)李师傅压制饸饹时,某一时刻
与水平方向的夹角为
,则手柄
上点
的高度降低了多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e28c0a00115e4c92f392c6a22dc41abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef1cdef728aacc58fce1e4f596493269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6220118a30064df57bed88ae5b63aea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3fefe07cbda3517e88b226d557dc2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(结果精确到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd58f9f2603b2a02db40ca2bf9d17a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0023fd92fe236a42ec2ec7960e652a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c5576fe0708ed93d857ea93394a721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df91a3cda5ac91528c4ea96bf3b322c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
(2)李师傅压制饸饹时,某一时刻
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
您最近一年使用:0次
2024-01-16更新
|
81次组卷
|
2卷引用:山西省运城市临猗县多校2023-2024学年九年级上学期期末数学试题
名校
2 . 隘街某店铺在窗户上方安装一个遮阳棚,如图所示,遮阳棚展开长度
,遮阳棚固定点A距离地面高度
,遮阳棚与墙面的夹角为
.在某一时刻,一位身高
的顾客
在太阳光下的影长
,求此时遮阳棚在地面上的影长
.(
,结果精确到
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a754f490a46f1664c3b1b8bcc73c217a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c75bbff567b34c6b2a7230ee3280d97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a386ee919a591cfe15d84fb1eddc2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ea270678b9db2551766773e5596ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048b61a5fb5f420c6d7de88db5bc3aa5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/16ad6bbe-c5ff-44fa-96b3-dc2f2938f165.png?resizew=149)
您最近一年使用:0次
3 . 国家跳台滑雪中心位于北京2022年冬奥会张家口赛区古杨树场馆群,是我国首座符合国际标准的冬奥会跳台滑雪场地.外观结构与中国传统吉祥物“如意”的S形曲线完美融合,因此,被形象地称为“雪如意”,在它的身上,体现了现代建筑与自然山水、历史文化的交相辉映,在这里举行的跳台滑雪分大跳台和标准台,大跳台A点出发区海拔1771米,着陆点U点海拔1635米,大跳台与标准台水平相距
米,大跳台坡角
,标准台坡角
.求大跳台与标准台出发点落差
是多少?(参考数据:
,
,
;
,
,
,结果保留整数.)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d194ea0173c3e096ffb9146a85743d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f766494b4aa7cab3c371165a9e914239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fb264d5fed7c2293dc568d3fb6e01e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27acebe4b2151ece74173c272a2fee9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cb722c9b6f930fa227e62da71c1a77f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/097b2e089c432375c4e5280061809b7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3c2d2db1fa8a6c703c6edecfa038d85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb7e8186509333d743c128cec63d9994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59edc04822a09c8aacb12f7641c36376.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/20/9ea7a1ee-d4a7-4f18-a8a5-b6b51a1f4f02.jpg?resizew=409)
您最近一年使用:0次
4 . 在学习镜面反射后,小明知道了当入射光线与镜面垂直时,反射光线将与入射光线重合,沿原路返回.他利用此现象设计了一个测量物体高度的工具.
在一次实际测量过程中,小明测得测高工具与建筑物的水平距离
米,请计算建筑物
的高度(结果精确到0.1米,参考数据:
).
项目 | 图例 | 说明 |
测量工具横截面图 |
| 直角三角形![]() ![]() ![]() ![]() ![]() ![]() |
测量示意图 |
| 在建筑物![]() ![]() ![]() |
待测数据 |
|
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3493ba3ba6a1c69ad1ab9f0039129c30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460317e7c26f95b9b29cfe1a89b796d6.png)
您最近一年使用:0次
2023-09-15更新
|
88次组卷
|
2卷引用:2023年山西省朔州市山阴县部分学校中考模拟数学试题
5 . 如图,某“综合与实践”小组欲测量当地的一座宝塔AB的高度,他们利用高度为1米的测倾仪在点C处测得该宝塔顶部A的仰角
.由于宝塔底部B不能直接到达,于是他们将测倾仪后退60米到达点D,测得该宝塔顶部A的仰角
.点A,B,测倾仪
和
均在同一平面内,求该宝塔
的高度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0b93f41e2d30d1a48274256074143f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3323f55d5b9f7bae0a1354c3c5905806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.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/2023/9/17/468681d8-36a8-4bce-81f9-eae0909a1aac.jpg?resizew=168)
您最近一年使用:0次
6 . 眼睛是人类感官中最重要的器官之一,每年的6月6日定为全国爱眼日,小林想要探究自己按照标准护眼姿势读书时书籍应离身体多远,画出如图的侧面示意图,点A为眼睛的位置,A到书籍
的距离
为40cm,
与水平方向夹角
为
,小林在书桌上方的身长
为52cm,且
垂直于水平方向,请你求出小林与书籍底端的水平距离
.(参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d598f4a17ac14970ade9f381e9aee970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48cf21017ebe712348fbe500113dbc59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/70716b98e77bdcd68512b18f91ccbb21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e8fd5213e37e2555db9cc2c12cec7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9585715711c64f7778a59feb4e0d599.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/27/46e3f426-11f3-4f3e-af0e-cc1a45adf2fb.png?resizew=346)
您最近一年使用:0次
2023-09-09更新
|
179次组卷
|
3卷引用:山西省晋城市多校2023-2024学年九年级上学期期末联考数学试题
7 . 随着人工智能技术的飞速发展,越来越多的智能产品进入人们的日常生活,人们足不出户就能通过远程操控处理各种事情,“智享生活、乐在其中”成为新世纪人们生活的最大变革
图
所示的是一款多功能智能语音翻译器,其侧面示意图如图
所示,
,
,底座
的长度为
,顶部
的长度为
请你分别求出该语音翻译器的后背
和前屏
的长度?(结果精确到
;参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e1d0f65817ba32a732040518f41440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3798a74058ec4bc40b6d9b5d268c359b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c30c4bedb1189fe96828f8b2df21641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb26c5cdef6f16f4b39cd091041b439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d04216651041ddfb04c68c93c6719a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd58f9f2603b2a02db40ca2bf9d17a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/153df8ab54749477613adeb094dacce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d03a39dcc9840cb5e51a24dbc308a62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e8edc744d95d5d0f7f5ef505a5607e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/23/cf449799-4417-4558-954d-194c84e40b08.png?resizew=320)
您最近一年使用:0次
8 . 综合与实践:
问题情景:如图,在
中,
为对角线
,
的交点,
,
,
,
为
上一动点,连接
并延长交
于点
.
独立思考:(1)当
时,求
的度数;
实践探究:(2)当四边形
为平行四边形时,求
的长;
问题解决:(3)当点
在
的垂直平分线上时,直接写出
的长.
问题情景:如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650c6c818df102a83ce5159e3208d01a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feda722a8a8f4b6a84d9ea614e4e8de7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
独立思考:(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05805b7d1de800f3446ea176a9e00b64.png)
实践探究:(2)当四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bddc68ed03fe7fd1fe30a5e626ba435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
问题解决:(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/20/c576cd26-d1e8-4241-bb51-a65ff3e617a4.jpg?resizew=333)
您最近一年使用:0次
2023-08-12更新
|
91次组卷
|
3卷引用:山西省运城市2022—2023学年八年级下学期期末数学试题
山西省运城市2022—2023学年八年级下学期期末数学试题山西省清徐县县城第二初级中学校2022--2023学年八年级下学期期末数学试题(已下线)专题18.13 矩形(分层练习)(提升练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(人教版)
9 . 综合与实践
问题情境:活动课上,同学们以三角形为背景探究图形变化中的数学问题.如图1,
中,
.将
从图1的位置开始绕点C顺时针旋转得到
(点A,B的对应点分别为点
),旋转角为α(
).
操作思考:
(1)如图2,“明辨”小组画出了
恰好经过点B时的图形.求此时旋转角α的度数;
(2)如图3,“善思”小组画出了点
落在
延长线上时的图形,此时点
也恰好在
的延长线上.过点B作
的平行线交
于点P,猜想
和
的数量关系,并说明理由;
拓展探究:
(3)如图4,“博学”小组在图2的基础上,将
沿射线
的方向平移,点B,C,
的对应点分别为D,E,F,若
,当以A,
,D为顶点的三角形是以
为底边的等腰三角形时,请直接写出平移的距离.
问题情境:活动课上,同学们以三角形为背景探究图形变化中的数学问题.如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b185184dc2dc3894a0313fd13f26a59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1320d3b30daf11c5a7419983da3b3776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e915c7310f3781887a1afb99dbf949.png)
操作思考:
(1)如图2,“明辨”小组画出了
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
(2)如图3,“善思”小组画出了点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
拓展探究:
(3)如图4,“博学”小组在图2的基础上,将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def0507ec4fec5f53b5e55d74ba3a3e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5326817f9af012432a202749d1df59f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/25/3f3aa813-d288-4500-aeec-90403e85eef1.png?resizew=561)
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10 . 综合与实践
问题情境:在
中,
.点
在
斜边
上运动,过点
作射线
,分别与边
交于点
.
猜想证明:
(1)当点
在
斜边
的中点处时,
①如图(1),在
旋转过程中,当点
时,
与
的数量关系是______,
_______.
②当
旋转到如图②所示的位置时,
的值是否发生变化?若不变,请证明;若变化,请说明理由.
③如图③,在
旋转过程中,当
时,直接写出线段
的长_______;
类比探究
(2)当点
在
斜边
上运动时,
①如图④,当点
运动到
时,
_______;
②如图⑤,连接
,当
是等腰三角形时,求
的长.
问题情境:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d0c819e913ae45d87a1898257e8e6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be6e0c4c7e268084a0523f54fbe9f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
猜想证明:
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/31/7a619122-13c8-426e-959b-894b7bf82975.png?resizew=698)
①如图(1),在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46060ff16376f584eb554e09686ab703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/824938c27f63ba9b36eaea6cdd389e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e064e7a02d1db4f5269e7a512c23baf.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46060ff16376f584eb554e09686ab703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fcc76f6c07ce7e0bc75653ea0351526.png)
③如图③,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46060ff16376f584eb554e09686ab703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b38bbd93669765af69d7bb0049e2819b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
类比探究
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
①如图④,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5461da7d3ccd8ae644157361962a8693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e064e7a02d1db4f5269e7a512c23baf.png)
②如图⑤,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129f1d6567bef09b00b7f37894e6dba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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