综合与实践
在综合实践课上,小明想做一些矩形木板零件,他找到了一些木板余料:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/02e7f782-b1ff-4c52-bc7e-fbb1a5ae0ea9.png?resizew=329)
(1)如图
,已知三角形小木块
,边
,高
,小明要利用它做一个正方形零件,使正方形的一边在
上,其余两个顶点分别在
,
上.求加工成的正方形零件
的边长是多少?
(2)如图
,已知三角形小木块
,边
,高
,小明要利用它做一个矩形零件,使矩形的一边在
上,其余两个顶点分别在
,
上.求加工成的矩形零件
面积的最大值是多少?(用含
,
的代数式表示)
(3)如图3,已知四边形的小木块
,测得
,
,
,
,小明要利用它做一个矩形零件,使矩形的一边在
上,其余两个顶点分别在
,
上.求加工成的矩形零件
面积的最大值是多少?
在综合实践课上,小明想做一些矩形木板零件,他找到了一些木板余料:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/02e7f782-b1ff-4c52-bc7e-fbb1a5ae0ea9.png?resizew=329)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c6f334c02d16e60c36a9aeafb53d57b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab49647e8f50a47e3684abce60f64d7.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61d22f065ec04de109d913e8e7855110.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
(3)如图3,已知四边形的小木块
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603731dfd3803024ccbb69131a47de7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd25239262d8967a619c4ad10a71004a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2929891b9b8f55222e5aaac8c7860f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8b768530dc812e6642bd852f0f50cbd.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
更新时间:2024-02-20 16:20:14
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相似题推荐
解答题-问答题
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名校
【推荐1】已知:如图,抛物线
与y轴交于点
,与x轴交于点A、B,点A的坐标为
.
(1)求该抛物线的解析式;
(2)点Q是线段
上的动点,过点Q作
,交
于点E,连接
.求
;
(3)在(2)的条件下,设点Q的横坐标为m,
的面积为S,求S关于m的函数关系式;当
的面积最大时,求点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bac419e547ef6b3f34aae7ae59c5c4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5907cec6649703d5e158bf44b3c4dc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf65c63b509b452e93f0de4fd768259.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/14/dda57556-1ed3-49d8-b716-80ceda689774.png?resizew=196)
(1)求该抛物线的解析式;
(2)点Q是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/477299ffa5ca3e4664b2cbae878f5f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de029f895ef336cec312087d4aa1321.png)
(3)在(2)的条件下,设点Q的横坐标为m,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86643348a8164750d9aefcfe20fecb7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86643348a8164750d9aefcfe20fecb7c.png)
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【推荐2】抛物线
过点
,点
,顶点为C.
![](https://img.xkw.com/dksih/QBM/2022/2/23/2922527826886656/2924102713876480/STEM/19084da0-4c72-4938-bcd6-929417866916.png?resizew=506)
(1)求抛物线的表达式及点C的坐标;
(2)如图1,点P在抛物线上,连接
并延长交x轴于点D,连接
,若
是以
为底的等腰三角形,求点P的坐标;
(3)如图2,在(2)的条件下,点E是线段
上(与点A,C不重合)的动点,连接
,作
,边
交x轴于点F,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d8de071a9c22c96a59b172d76c127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d03fa28c117649b0fdfe17eed7b583.png)
![](https://img.xkw.com/dksih/QBM/2022/2/23/2922527826886656/2924102713876480/STEM/19084da0-4c72-4938-bcd6-929417866916.png?resizew=506)
(1)求抛物线的表达式及点C的坐标;
(2)如图1,点P在抛物线上,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644f63756fe9251e65cc14e1ce9723d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(3)如图2,在(2)的条件下,点E是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ed04e08d287891ff58416cb460b3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
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【推荐3】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)
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解答题-问答题
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真题
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【推荐1】如图,已知二次函数的图像过点
,
,与
轴交于另一点
,且对称轴是直线
.
![](https://img.xkw.com/dksih/QBM/2018/6/29/1977526104449024/1978148638687232/STEM/28dc007baee249eca115a0d01abc4ecb.png?resizew=218)
(1)求该二次函数的解析式;
(2)若
是
上的一点,作
交
于
,当
面积最大时,求
的坐标;
(3)
是
轴上的点,过
作
轴,与抛物线交于
,过
作
轴于
.当以
、
、
为顶点的三角形与
、
、
为顶点的三角形相似时,求
点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1a9821a00b71f6b7d7a76d91b3f810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89411d4e5574780f523e4eb3166c48b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://img.xkw.com/dksih/QBM/2018/6/29/1977526104449024/1978148638687232/STEM/28dc007baee249eca115a0d01abc4ecb.png?resizew=218)
(1)求该二次函数的解析式;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d24e554db06a587a517a1901be12601a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246b32e19ae21b0cd1f826c47f517ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2784a52c4da98dc9df661fc152fc29e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2241bd71e0c20867029e489f9ba655d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/1dde8112e8eb968fd042418dd632759e.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/dad2a36927223bd70f426ba06aea4b45.png)
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解题方法
【推荐2】在四边形ABCD中,AB=AD,BC=CD.
(1)如图1,求证:AC垂直平分BD;
(2)如图2,若∠BCD=60°,∠ABC=90°,E、F分别BC、CD上的动点,且∠EAF=60°,AE、AF分别与BD交于G、H. 求证 :△AGH ∽△AFE;
(3)如图3,在(2)的条件下,若EF⊥CD,求
.
(1)如图1,求证:AC垂直平分BD;
(2)如图2,若∠BCD=60°,∠ABC=90°,E、F分别BC、CD上的动点,且∠EAF=60°,AE、AF分别与BD交于G、H. 求证 :△AGH ∽△AFE;
(3)如图3,在(2)的条件下,若EF⊥CD,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63084b82dc504c78e3cc92460598c573.png)
![](https://img.xkw.com/dksih/QBM/2021/6/5/2736187209924608/2737381266980864/STEM/e44402e7-f164-4448-8a9a-ebdc45be7aa4.png)
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