某小区内有一块如图所示的四边形空地
,
米,
米,
米,且
.计划将这块空地建成一个花园,以美化小区环境,预计花园每平方米造价为300元,小区修建这个花园需要投资多少元?(结果保留根号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3b3d73ff96882a0fb4d025ecc5669d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
23-24八年级下·山东临沂·阶段练习 查看更多[3]
山东省临沂市临沭县第二初级中学2023-2024学年八年级3月月考数学试题(已下线)期中押题卷01-【好题汇编】备战2023-2024学年八年级数学下学期期中真题分类汇编(山东专用)湖北省随州市广水市2023-2024学年八年级下学期期中数学试题
更新时间:2024-03-27 09:16:45
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【推荐1】如图,
是
的直径,弦
于点E,G是弧
上一点,
,
的延长线交于点F,连接
,
,
.
(1)求证:
;
(2)已知
,
,求
的半径长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad63ab71efa010821650ffe08bd907f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ea03277f8408fabe5b327cc34838f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdd9f345915ae742ed3dcd3f9678264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e47634c8bc677c86728a212247896b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a022d9ed35c8ce5ce01c2663a7115f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/586efe63-48d1-431c-8e7b-30ba4d58043e.png?resizew=195)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caee0b998d9b60a10fd9a32b5cefe4b6.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa61c2f40d7bcbf1eafbe6bbc3adfde7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db284d584b97947cfcbb053cde82f0d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
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【推荐2】如图,在平面直角坐标系中,菱形
的顶点
与原点
重合,点
在
轴的正半轴上,点
在反比例函数
的图象上,点
的坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/f7cbff65-060c-42bd-9695-d0a4036a4b58.png?resizew=164)
(1)求反比例函数的关系式;
(2)设点
在反比例函数的图象
上,连接
,若
的面积是菱形
面积的
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac9ce156af48fafa06e10b85f039146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11821b04b25eaa22d4e10a61ef5f1952.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/f7cbff65-060c-42bd-9695-d0a4036a4b58.png?resizew=164)
(1)求反比例函数的关系式;
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be0c2a066a729a66639acd0c7674dfa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8a3b398adbf0cb4c438334a4255399.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1cbf03524f866cc66d019a01e7c4284.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/ac047e91852b91af639feec23a9598b2.png)
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【推荐3】利用素材解决:《桥梁的设计》
问题驱动 | 某地欲修建一座拱桥,桥的底部两端间的水面宽![]() ![]() ![]() ![]() ![]() ![]() | |
设计方案 | 方案一 | 方案二 |
设计类型 | 圆弧型 | 抛物线型 |
任务一 | ![]() 设计成圆弧型,求该圆弧所在圆 的半径. | ![]() 设计成抛物线型,以AB所在直线为x轴,AB的垂直平分线为y轴建立坐标系,求桥拱的函数表达式. |
任务二 | 如图,一艘货船露出水面部分的横截面为矩形![]() ![]() ![]() ![]() |
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【推荐1】一块钢板形状如图所示,量得
,
,
,请你计算一下这块钢板的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73ba94cec6c03980be9ca03774379fa2.png)
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【推荐2】如图,在珠海横琴一块三角形土地上,准备规划出阴影所示部分作为绿地,若规划图设计中∠ADC=90°,AD=8,CD=6,AB=26,BC=24,求绿地的面积.
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