名校
1 . 某养殖户准备围建一个矩形鸡舍,其中一边靠墙
,另外的边(虚线部分)用长为28米的篱笆围成,并将矩形鸡舍分成两个相同的房间,每个房间并各留出宽1米的门方便进出.已知墙的长度为12米,设这个鸡舍垂直于墙的一边的长为x米,鸡舍的面积为S.
(2)求出鸡舍的面积S的最大值,此时x为多少米?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)求出鸡舍的面积S的最大值,此时x为多少米?
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2 . 已知正方形的边长为
,则它的面积
与边长
的函数图象为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3160fce05b551569b8c7b5de6dd8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/012b14b48c09eb820c49c13dccb642bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3646f7feb3fb24f06a7fb9aaace7de39.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3 . 为了节省材料,某工厂以岸堤
(岸堤足够长)为一边,用总长为80米的材料围成一个由三块面积相等的小长方形组成的长方形
区域(如图),若
米,则给出下列四个结论:①
米,②
;③
;④长方形
的最大面积为300平方米,其中,正确的是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7bc63210bcec988e7ba5cb3e8663bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7d1957dabbcedb7ed2d612f8a7b4d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee498e34b21dea01638f5c6adccb3561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8408cdf53667cef5c76fb3a2cec99e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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4 . 已知一个直角三角形两直角边长之和为10 cm,则这个直角三角形的最大面积为( )
A.6.25 cm2 | B.12.5 cm2 | C.25 cm2 | D.31.25 cm2 |
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5 . 如图,若用长
的铁丝借助墙
围成一个斜边为
的直角三角形
,则所围成的
的最大面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/2136d2d3-a1f9-4e5b-af3f-7f30d30964f6.png?resizew=184)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/733f18665886669b11bc5e4945d7a943.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8946331b0a9d86e1a9c78797f3021455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6c91095a761f7c3f2197035b3ae272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73892892025e13b6d45f88a266b1fe6f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/2136d2d3-a1f9-4e5b-af3f-7f30d30964f6.png?resizew=184)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 问题情境:
“综合与实践”课上,老师让同学们以“矩形的翻折”为主题开展数学活动.
第1步:有一张矩形纸片
,在
边上取一点
沿
翻折,使点
落在矩形内部
处;
第2步:再次翻折矩形,使
与
所在直线重合,点
落在直线
上的点
处,折痕为
.
翻折后的纸片如图1所示
的度数为____________;
(2)若
,求
的最大值;
拓展应用:
(3)一张矩形纸片通过问题情境中的翻折方式得到如图2所示的四边形纸片
,其中
的一边与矩形纸片的一边重合,
,
,求该矩形纸片的面积.
“综合与实践”课上,老师让同学们以“矩形的翻折”为主题开展数学活动.
第1步:有一张矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
第2步:再次翻折矩形,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3f7368811340328acf5be13f499d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3f7368811340328acf5be13f499d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
翻折后的纸片如图1所示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ffab06abe01c9b48aa4692c73d8b7c6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7288ae412a2147cbc2cef4294538476d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
拓展应用:
(3)一张矩形纸片通过问题情境中的翻折方式得到如图2所示的四边形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13120e2133d0ba64f06aa6e82a560fbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6992b3bcc99e2ed0fe91ddb21b63c561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2961788d557835a374fd2a496271834e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f464d174064bab081d6d1b9240d887db.png)
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2024-04-22更新
|
346次组卷
|
3卷引用:2024年江苏省南通市海安市九年级中考一模数学试题
7 . 如图,在平面直角坐标系
中,已知点
、点
,抛物线
经过点
,且顶点
在线段
上(与点
、
不重合).
、
的值;
(2)将抛物线向右平移
(
)个单位,顶点落在点
处,新抛物线与原抛物线的对称轴交于点
,连接
,交
轴于点
.
①如果
,求
的面积;
②如果
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0d1e4a02f6a99a4b838dcaf9541d7f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6938eeb65411eeac15e140cf1db99773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.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/f52a58fbaf4fea03567e88a9f0f6e37e.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/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)将抛物线向右平移
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
①如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b996e05aecd15a1416b8475c73c02c3c.png)
②如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec04a4fd8819efcaf01ef8cf6f485e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2024-04-22更新
|
275次组卷
|
3卷引用:2024年上海市松江区中考二模数学试题
2024年上海市松江区中考二模数学试题(已下线)专题13 压轴24题二次函数综合60题专练(含上海24年最新模拟题)-2024年中考数学毕业班二轮热点题型归纳与变式演练(上海专用)数学(长春卷)-【试题猜想】2024年中考考前最后一卷
8 . 如图,某劳动小组借助一个直角墙角围成一个矩形劳动基地
,墙角两边
和
足够长,用总长
的篱笆围成另外两边
和
.有下列结论:
的长是
时,劳动基地
的面积是
;
②
的长有两个不同的值满足劳动基地
的面积为
;
③点
处有一棵树(树的粗细忽略不计),它到墙
的距离是
,到墙
的距离是
,如果这棵树需在劳动基地内部(包括边界),那么劳动基地面积的最大值是
,最小值是
.
其中,正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf2fc57da7f8399eae9ad9ad22ca836.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/6307c0249ba768c1c0c9a253c31720d2.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb92c9032804326713c7b4feea53f40.png)
③点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e978c77cb0d7eff794447241e9829867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ea92883fe24b097c9a881ef8c92eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a796b826cc01a89d10f83be5e29d7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4fb5474bdc74da700b463eabd05bd8e.png)
其中,正确结论的个数是( )
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
9 . 已知抛物线
(
)与
轴交于
,
两点(点
在点
左边),与
轴交于点
.
(1)若点
在抛物线上.
①求抛物线的解析式及点
的坐标;
②连接
,若点
是直线
上方的抛物线上一点,连接
,
,当
面积最大时,求点
的坐标及
面积的最大值;
(2)已知点
的坐标为
,连接
,将线段
绕点
顺时针旋转
,点
的对应点
恰好落在抛物线上,求抛物线的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/387cf772ee84a0756a97b403a5cfcf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac9eb4f13a6ec140f7050e8d7dde52c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27814a264126a21491c1963346b176a.png)
①求抛物线的解析式及点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
②连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a33cd211f77152e153f404e58a04d77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350e954f629c1901a5cec03558319e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/350e954f629c1901a5cec03558319e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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名校
10 . 阅读材料:如图(1),在
中,
,点P在
边上,
于点
于点F,则
.(此结论不必证明,可直接应用)
如图(2),正方形
的边长为2,对角线
相交于点O,点P在
边上,
于点
于点F,则
______;
(2)【类比与推理】
如图(3),矩形
的对角线
相交于点
点P在
边上,
交
于点E,
交
于点F,求
的值;
(3)【拓展与延伸】
四边形
是半径为4的圆内接四边形,对角线
相交于点O,
,点P在弦
上,
交BD于点E,
交
于点F,当
时,试判断
的值是否为定值,若是请求出该定值并求出四边形
面积的最大值;若不是定值,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1336496362282a03b805c4d14b823308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b37625595a63cb47e1cdf9c5da40c3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff6927b60a532649f330cdecf5bf04a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0bfd5c0506342a0127b9d0a1ed9601.png)
如图(2),正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b37625595a63cb47e1cdf9c5da40c3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff6927b60a532649f330cdecf5bf04a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de1c2a266873044e21dd02c9f7e4e0e0.png)
(2)【类比与推理】
如图(3),矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32ff7566dfbf1d22bf693f825d83ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7681c103bfed97988a516065d1c7d91a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb754e9542819c137b4c049c5cff66aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bce17597a7a6a83cd4287d424db6b56.png)
(3)【拓展与延伸】
四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46cc1c481e243ca311a6369c8313a18f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d60f55c585f1b455027202684b13e7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2103beb858805577d9402209c518828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bce17597a7a6a83cd4287d424db6b56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c4cfb55d68dfc47530b4604f63d69c.png)
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