1 . 某校计划用总长为30米的篱笆围成一边靠墙(墙足够长)的劳动实践区域,同学们提出了围成矩形、半圆形两种方案.如果要让该劳动实践区域的面积尽可能大,应选择哪种方案﹖请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/65e8a42f-3458-4c0e-8469-6dd5ca80ffda.jpg?resizew=340)
您最近一年使用:0次
2 . (1)如图1,在
中,
,
,
.
与
、
两边分别相切于点E,F,圆心O恰好在
上,求
的半径.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/3cfb0b89-eaf5-4197-be57-224ae2a9ee4a.png?resizew=166)
(2)已知某文创园区原有一块草坪(
区域)如图2所示,经测量:
,
,在M处建有一个亭子,满足
.现要在原基础上扩大面积重新规划为花卉展区,要求在
上找一点P,连接
并延长到点D,使得
,过点P分别作
于E,
于F.按设计要求,四边形
区域为游客观赏区,其余部分为花卉展区(
、
、
三部分总和).为了游客得到更好的体验,需要尽可能把花卉展区布置大一些,请问能否将花卉展区面积设计最大?若可以,请求出最大面积;若不可以,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/3cfb0b89-eaf5-4197-be57-224ae2a9ee4a.png?resizew=166)
(2)已知某文创园区原有一块草坪(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21de382f8bc3f51527a866701022a754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71c99b3e4e4e3200e0e6aef0af2a0112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67b686b84b7a2b8e2326dbb88af5e855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d603566c74b1d5de510a2e8f7859010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97136ba3d3ffd4c48a50d69ea502d707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e488c00f4ef96956e2a7a1fdbded624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe40405cd7bd60d69dd535d6da85c00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150fe3137f76a6f05d9148c7d8c1810e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/4c4d45ed-06c5-4b7a-bde5-e97393791eb8.png?resizew=150)
您最近一年使用:0次
2024-02-26更新
|
71次组卷
|
2卷引用:陕西省西安市西北工业大学附属中学2023-2024学年九年级上学期期末数学试题
3 . 如图,学校计划围一个矩形花园,它的一边是墙(长度大于10m),其余三边利用长为10m的围栏,试确定其余三边的长度,使其分别满足下列条件:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/7273394d-1791-40cd-af85-9bb8e659e6b8.png?resizew=177)
(1)花园的面积为12m2;
(2)花园的面积最大.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/7273394d-1791-40cd-af85-9bb8e659e6b8.png?resizew=177)
(1)花园的面积为12m2;
(2)花园的面积最大.
您最近一年使用:0次
4 . 湖南农业大区零陵区土地资源丰富,近年来,该区利用农业特色资源优势,大力发展特色种植,带动农民门口致富,尤其是各种水果的种植驰名省内外.下面是一家果农所遇到的问题,请你阅读下面材料帮忙解决果农所遇到的问题.
(1)任务1:求纽荷尔脐橙产量的年平均增长率;
(2)任务2:为了放下适当数量的纽荷尔脐橙,现有边长为
的正方形纸板,将四角各裁掉一个正方形,折成无盖长方体纸盒.折成的长方体盒子侧面积(四个侧面的面积之和)有没有最大值?如果没有,说明理由;如果有,求出此时剪掉的正方形边长.
信息及素材 | |
素材一 | 在专业种植技术人员的正确指导下,果农对纽荷尔脐橙的种植技术进行了研究与改进,使产量得到了增长,根据果农们的记录,2020年纽荷尔脐橙平均每株产量是50千克,2022年达到了72千克,每年的增长率是相同的. |
素材二 | 一般采用的是长方体包装盒. |
(1)任务1:求纽荷尔脐橙产量的年平均增长率;
(2)任务2:为了放下适当数量的纽荷尔脐橙,现有边长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec37f17b91ff1f6aeda1e2599e44483a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/0538c5ed-cccd-4b2e-a4bf-6e3d243f8efa.png?resizew=101)
您最近一年使用:0次
2024-02-08更新
|
86次组卷
|
2卷引用:湖南省永州市零陵区2023-2024学年九年级上学期期末数学试题
5 . 如图,九(1)班劳动实践基地位于形围墙的内侧,已知
,墙
长7米,墙
长3米.同学们准备用10米长的围栏,在基地内围出一块矩形菜地(可利用围墙).请问他们能围出的最大面积是
.
您最近一年使用:0次
6 . 如图,在边长为
的正方形
各边上取点
,
,
,
(可与
,
,
,
重合),使得四边形
为正方形.设
为
,正方形
的面积为
.
(1)
关于
的函数表达式是________,自变量
的取值范围是________;
(2)在下面的平面直角坐标系
中,画出(1)中函数的图象;
(3)当
________
时,正方形
面积有最小值________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095ab4a92bf822e175d370e6d0c8a730.png)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3160fce05b551569b8c7b5de6dd8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740004cfdade4c185f722dadc27e15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/1/65ce919d-8ed5-4359-862c-d6a1d05932f2.png?resizew=398)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)在下面的平面直角坐标系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
您最近一年使用:0次
7 . 【问题探究】
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/ec3286cd-9051-4f7d-906c-3f1e67b844a1.png?resizew=290)
(
)如图
,已知线段
,将线段
绕点
顺时针旋转
得到线段
,连接
,在线段
上取一点
,使
,延长
至点
,使
,连接
.求
的值及
的面积;
【问题解决】
(
)某市为保护生态环境,方便市民观光游览,准备在某地修建一处“和谐观光园”,其形状为菱形
,如图
所示.在菱形
中,
,实际长度
公里,根据用地需求,需在
上确定点
,
上确定点
,将五边形
作为特色植物繁育区,
作为花展示区.根据设计要求,
公里,为使花卉展示区容纳更多的游客,要求花卉展示区
的面积尽可能的大,请问这样的
是否存在?若存在,请求出
面积最大时点
到点
的距离及
面积的最大值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/ec3286cd-9051-4f7d-906c-3f1e67b844a1.png?resizew=290)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90be20bb5f3617017cc6980646074d45.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/f74a61581d965458316280968241e4c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19741eaa3714f1b8fb7345d3cd7300d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c71349fa485f9107205498af09fd143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96645a3530e72d5d733d2c72147d340.png)
【问题解决】
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb34d6d26481113c0ac4af0366f72e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6052b7c9c6232ef6adf3885c58e6d178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
您最近一年使用:0次
8 . 已知直线
与
轴、
轴分别交于
两点,抛物线
过点
,与
轴的另一个交点为点
.
(1)若
,点
的坐标为
,求抛物线的解析式;
(2)若
,探究
与
之间的数量关系,并说明理由;
(3)点
的坐标为
,以
为边在
轴上方作正方形
,若抛物线
的顶点
在正方形
的边上,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e7ff38d91460dd3eae8a1c4c0bc1111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae6f48b9a53c0155a692509cf31f7e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cca0ec4b4343a6ccd13b652aea1d00c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c92ae7a5cd7a0e337b758f0e443cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
9 . 如图,某校计划在边长为
的正方形花坛
内种花,过
上一点P作
,
,分别交正方形
的四边于点E,F,G,H,连接
,在
区域种百合花,在四边形
区域种玫瑰花.若种植百合花的成本为20元/
,玫瑰花的成本为15元/
,则种植两种花卉的计划成本最少为_______ 元.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167e6e41ac221847824a72e964f340f1.png)
![](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/ee73452ee4d5437f1399f1235b95e55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/912ec2726c1c57bbc7c2d44e8a674a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f9f6c7d14b7be2b0c7d1267c9ca740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf98c81b7d0f84b4a974b2cb7a43918.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/e6ee2e64-d713-4f83-b38f-f2fad029e826.png?resizew=139)
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10 . 综合运用
在矩形
中,以点
为坐标原点,分别以
,
所在直线为
轴、
轴,建立平面直角坐标系,点
是射线
上一动点,连接
,过点
作
于点
,交直线
于点
.
(1)如图①,当矩形
是正方形时,若点
在线段
上,线段
与
的数量关系是_________(填“相等”或“不相等”);
(2)如图②,当点
在线段
上,且
,以点
为直角顶点在矩形
的外部作直角三角形
,且
,连接
,交
于点
,求
的值;
(3)如图③,若点
,点
,点
在线段
的延长线上,点
在线段
的延长线上,
,连接
,取
的中点
,连接
,设
,
,求
关于
的函数关系式.
在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627a9e02e94a5dbda8b0df0090974bea.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/411ee1e6-f225-4030-a71a-ac073c2a6726.png?resizew=461)
(1)如图①,当矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
(2)如图②,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e14bf3f4b6174904f733d72853f287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/630a21ba7a8e1b8bca73c1634cc6f74d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/064213ea888b9dbcd35506abb0211e4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2d8811d24ff319066e6dd9408ec255.png)
(3)如图③,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee33736169c249a029f478a605dc2c05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a65d8ff9318909d18b6e1c76f90d61f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a01283f3db80f9e8789a88fb03c1e344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee5eb95ca8e59f32cc6c27ff668bb71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a21957e4ca5631ac38e7eb6afa118bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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