名校
1 . 解答题
(1)问题提出:如图①,在
,中
,点D为斜边
的中点,且
,求
的值;
(2)问题解决:如图②,现有一块边长为1米的正方形钢板
,其中
,
,
均有不同程度的磨损,不能使用,王师傅计划过点A裁出一个形如四边形
的零件,其中点F,G,E分别在边
,
,
上,且点F为
的中点.
①王师傅想要使得
,在手头没有直角尺的情况下,进行如下操作:
第一步:取一根笔直的木棒,用铅笔在木棒上任意点出M,N两点;
第二步:将木棒斜放在钢板上,使点M与点F重合,保持点N不动,将木棒进行旋转,使点M落在
上,在钢板上将点M对应的位置标记为点G;
第三步:将
延长,再将木棒绕点N旋转,使点M落在
的延长线上,记点M的对应点为点Q;
第四步:作射线
交
于点E,则
.
请问,王师傅的操作方法是否能够得到
?请证明;
②在①的条件下,王师傅想要得到最大面积的四边形
,请你计算四边形
面积的最大值.
(1)问题提出:如图①,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432cce1481829c4dfe2bd557f6e9aa4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70606b1ac03c18dcba0e000f44dcda96.png)
(2)问题解决:如图②,现有一块边长为1米的正方形钢板
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72794bd3cbe1a898e2254c3dd98a437e.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
①王师傅想要使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05e031f40dc0718fb99d1f90ba65824a.png)
第一步:取一根笔直的木棒,用铅笔在木棒上任意点出M,N两点;
第二步:将木棒斜放在钢板上,使点M与点F重合,保持点N不动,将木棒进行旋转,使点M落在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
第三步:将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1460aa3d83df61f6c411b34412135451.png)
第四步:作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e66b12019cdf68327d34c90dff7c04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05e031f40dc0718fb99d1f90ba65824a.png)
请问,王师傅的操作方法是否能够得到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05e031f40dc0718fb99d1f90ba65824a.png)
②在①的条件下,王师傅想要得到最大面积的四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72794bd3cbe1a898e2254c3dd98a437e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72794bd3cbe1a898e2254c3dd98a437e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/26/88bce38a-a858-4645-b174-ed38d93afc31.png?resizew=323)
您最近一年使用:0次
2023-05-13更新
|
139次组卷
|
2卷引用:2023年陕西省西安市长安区五校联考中考四模数学试题
2 . 如图,
是一块小花园,其中
,
,小区物业现准备再开发一块地,把
扩充为四边形
,使
,
米,过点
作
交
于点
,物业计划在
处修建一条小路方便游客通行(路宽不计).若
,
.
(1)求
与
的函数关系式;
(2)当
取最大值时,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcfac9ab1dc776c9ec076ab2a132fcd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db6017798b58ab4df377ee9b7ec6f40f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d260eccf8d16e9ec44722fb55df12b55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4a7d7c2253a1686c61f8b8f3f6c6a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ddf2baf27c5a887477fb27c97b6425.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/6/a04ff269-6674-43c2-874b-ef9bc7183cb0.png?resizew=238)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
3 . 如图,已知抛物线
与x轴交于A、B两点(点A在点B的左侧),与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/21a8f515-0309-45a5-b698-3b7c8db9b22e.png?resizew=150)
(1)求点A、B,C的坐标;
(2)抛物线的对称轴l与x轴的交点为D,连接
,在抛物线上是否存在点E、F(点E、F关于直线l对称,且E在点F左侧),使得以D、E、F为顶点的三角形与
相似,若存在,求出点E的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f57c5d08e534712f29c041ee91478d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/15/21a8f515-0309-45a5-b698-3b7c8db9b22e.png?resizew=150)
(1)求点A、B,C的坐标;
(2)抛物线的对称轴l与x轴的交点为D,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
您最近一年使用:0次
2023-05-12更新
|
196次组卷
|
4卷引用:2023年陕西省榆林市第十中学中考二模数学试卷
4 . 从多边形的一个顶点引出两条射线形成一个角,这个角的两边与多边形的两边相交,该多边形在这个角的内部的部分与角的两边围成的图形称为该角对这个图形的“投射图形”
(1)如图1,正方形
的边为4,
与正方形
的边
、
分别交于点E、点F,此时
对正方形
的“投射图形”就是四边形
;若
,
,则四边形
的面积为_____;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/5e0bf418-ad47-46c4-901b-d122da2ec9bb.png?resizew=131)
(2)如图2,有一块菱形草地
,规划部门计划在这块空地内种植四种花卉,计划在边
、
上分别取点E、F,利用三条小路
、
、
把这块草地分割成四块种植区,已知
,
,请帮助规划部门根据下列要求解决问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/aa94f8fb-52f4-4f4c-b6f0-60087a79595c.png?resizew=390)
①若
对菱形
的“投射图形”四边形
的面积为菱形
面积的
,求
的值.
②在①的条件下,要使中间部分(
)种植区面积尽可能小,求
面积的最小值.
(1)如图1,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0268d04b9dea7629af27af9a0285a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93bc4c9dd737193f7acce692b23500d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/5e0bf418-ad47-46c4-901b-d122da2ec9bb.png?resizew=131)
(2)如图2,有一块菱形草地
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1afce2c04721d08936f3d1cba165d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b0ce914a50f5376766d5065e5f13d96.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/aa94f8fb-52f4-4f4c-b6f0-60087a79595c.png?resizew=390)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e31edc5b71c488ca9942d70d9298f01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac175010746fd4c90a55cb9081a1ffb6.png)
②在①的条件下,要使中间部分(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
您最近一年使用:0次
名校
5 . 如图1所示的矩形窗框
的周长及其两条隔断
、
的总长为
米,且隔断
、
分别与矩形的两条邻边平行,设
的长为
米,矩形
的面积为
平方米,
关于
的函数图像如图2,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/36be6e96-758e-425e-ad23-dd4b87fecb28.png?resizew=271)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/36be6e96-758e-425e-ad23-dd4b87fecb28.png?resizew=271)
A.矩形![]() | B.![]() ![]() ![]() |
C.当![]() ![]() | D.![]() |
您最近一年使用:0次
2023-05-09更新
|
372次组卷
|
5卷引用:2023年陕西省宝鸡市陈仓区中考二模数学试卷
6 . 如图,已知抛物线
与x轴交于A,
两点,与y轴交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/0d82115d-f0fc-4187-aca0-487b05aa9594.png?resizew=150)
(1)求抛物线的函数关系式;
(2)已知点D是抛物线的对称轴与x轴的交点,点E的坐标为
,点E与点F关于抛物线的对称轴对称,连接
,
,
,点P,Q是抛物线上两个动点,若
与
是以点D为位似中心的位似图形,求
与
的相似比.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/442834866daf52da017a459b05d8031b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e894101c52591ac320eed1c9b452f30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f57ecabf8b11f5c0bdbe50a34eb7a8e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/0d82115d-f0fc-4187-aca0-487b05aa9594.png?resizew=150)
(1)求抛物线的函数关系式;
(2)已知点D是抛物线的对称轴与x轴的交点,点E的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129f1d6567bef09b00b7f37894e6dba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129f1d6567bef09b00b7f37894e6dba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
您最近一年使用:0次
7 . 问题提出
(1)如图1,在矩形
中,
,
,
是对角线
上的一点,连接
,将
绕点
逆时针旋转
得到
,过点
作
于
,求
的长.
问题解决
(2)2022年3月我省局部发生疫情,为落实“科学防治、精准施策、分级管理”,我省某小区设计防疫区域,在道路
边固定柱子(点
,道路
边确定一点
,以
为边,搭建正方形防疫区域
,内部道路
上设点
作为记录处,
分别为不同的防疫物资放置区域,设计图简化如图2所示,已知道路两边
,道路宽为6m,Q为
上一定点,P为
上一动点,
于E.请问是否存在符合设计要求且面积最小的
?若存在,请求出面积最小值及此时
的长;若不存在,请说明理由.
(1)如图1,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.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/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66fae8e33cd86fa8dab72704eaafe1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
问题解决
(2)2022年3月我省局部发生疫情,为落实“科学防治、精准施策、分级管理”,我省某小区设计防疫区域,在道路
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80bba52e27bebb67941901778a9c66c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec780e86f57790cf88ec761e219bf5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b155567b46f0b107b7593fdad3973e48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9829fc6685b59fdc609f32f30ebd9e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c48e42ce4fd7e6da946bf2b7b22200db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3d566704b44ea4ef1f99c37bd46902.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/20/642de6ae-7f61-4d64-8d4f-29b8e872ef67.png?resizew=347)
您最近一年使用:0次
8 . 如图,在平面直角坐标系
中,抛物线
与x轴交于点
和点
,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/ec713eb9-6786-486e-b0a3-37ec66e1733b.png?resizew=249)
(1)求该抛物线的表达式及点C的坐标;
(2)如果点D的坐标为
,连接
、
,点P为抛物线上一点,当
时,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b286a72a818ccc52e63581841da08dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/993769b494e12c21dff0ee7c53a4a49f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852b303689c31189cd47bb4a3220f9fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/ec713eb9-6786-486e-b0a3-37ec66e1733b.png?resizew=249)
(1)求该抛物线的表达式及点C的坐标;
(2)如果点D的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afd928d67fc317e889f8623172bc8f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52aaf150d80dfc1e2918579de96540c7.png)
您最近一年使用:0次
名校
9 . 小静同学在手工课上制作了一个容器,经过该容器圆形开口中心点的纵剖面为如图所示的抛物面形,即剖面边沿为一条抛物线.经过测量可知该容器的口径
,最大深度为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/16/ee2fd35d-288c-4b86-93e0-fe7ee7bd1745.png?resizew=165)
(1)在如图所示的平面直角坐标系中,求出抛物线的表达式.
(2)小静同学在制作容器的过程中需要将容器分成三层,因此需要制作两个隔断板,即如图所示的
与
,要求每层的高度一致,即
与
,
与
,
与最低点P之间的距离均相等,同时满足
.请你根据要求计算隔断板
与
的长度.(结果保留2位小数,参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55974c8cd13032431ceb0c19d89f1b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe9f7abf7bcf4e1aa2579cd191d7761.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/16/ee2fd35d-288c-4b86-93e0-fe7ee7bd1745.png?resizew=165)
(1)在如图所示的平面直角坐标系中,求出抛物线的表达式.
(2)小静同学在制作容器的过程中需要将容器分成三层,因此需要制作两个隔断板,即如图所示的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226c4062dbfa2a78cf5dfd479cedacdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dad09268b7cb8bfcbea010cb6d2a29e.png)
您最近一年使用:0次
10 . 问题提出
(1)如图①,在
中,点
、
、
分别为边
、
、
的中点,
,
,
交
于点
,则
的长______ ;
问题探究
(2)如图②,在等腰直角
中,
,
,点
为线段
上一动点
点
不与点
、
重合
,以
为腰且在
的右侧作等腰直角
,
,
与
交于点
,连接
,求证:
;
问题解决
(3)如图是郊外一空地,为了美化生态环境,现要将这块地打造成一个公园,在空地一侧挖一个四边形的人工湖
,点
、
分别在边
、
上,且满足
,已知
,
,
,
,为了满足湖周边的建设用地需要,人工湖的面积需尽可能小,设
的长为
,四边形
的面积为
①求
与
之间的函数关系式;
②求人工湖面积的最小值及此时
的长.
(1)如图①,在
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
问题探究
(2)如图②,在等腰直角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/04582116cd765fcc5a52f44279ad6c94.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/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb476b0dac9799c720354d30b3a85c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14bdb8b4d6fe23ee29822f26a2359080.png)
问题解决
(3)如图是郊外一空地,为了美化生态环境,现要将这块地打造成一个公园,在空地一侧挖一个四边形的人工湖
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb57291ac092f035cdfb6f03e45e91d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f32d96abaf9c6b806e19b21cbe54c02f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f59054721475d6dd099a43fabbe0c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d7d047ca5c751aa5d192f63016289d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5412c2c0baa2fc01485358af68d6e885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8288df5c66b22fcb3e95d97b7b66f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb57291ac092f035cdfb6f03e45e91d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f6ace8dcb27eebe90c43cb77e9afa7.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②求人工湖面积的最小值及此时
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/ef008a9c-8e9b-414d-8476-c8aa4d5ce5ac.png?resizew=462)
您最近一年使用:0次