名校
1 . 隘街某店铺在窗户上方安装一个遮阳棚,如图所示,遮阳棚展开长度
,遮阳棚固定点A距离地面高度
,遮阳棚与墙面的夹角为
.在某一时刻,一位身高
的顾客
在太阳光下的影长
,求此时遮阳棚在地面上的影长
.(
,结果精确到
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a754f490a46f1664c3b1b8bcc73c217a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c75bbff567b34c6b2a7230ee3280d97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ea270678b9db2551766773e5596ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048b61a5fb5f420c6d7de88db5bc3aa5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/16ad6bbe-c5ff-44fa-96b3-dc2f2938f165.png?resizew=149)
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2 . 如图,在
中,D是
的中点,过点C作
交BD的延长线于点E,连结
.若
,
,则
的长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531d6f90f144551a35d494b1fe7d2b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/4/2b7aaee8-b8ee-413a-a382-01f7ae6a9d93.png?resizew=152)
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3 . 已知四边形
中,
,对角线
相交于点O.下列结论一定成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c4dec02850a02a8da56514ffffba952.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/989c75a3fd02e4971cab421c88de92f1.png)
A. ![]() | B. ![]() | C. ![]() | D.![]() |
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2023-11-25更新
|
128次组卷
|
3卷引用:山西省太原市2023-2024学年九年级上学期期中数学试题
4 . 如图,正方形
的边长为
,点E是边
的中点,点F在正方形
的边上运动,当
时,
与
相交于点H,则线段
的长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](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/6c55ee522f41c43253050e92b3c8de31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/a36bdf20-1618-47cf-86ad-3fab7b18c796.png?resizew=97)
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5 . 如图,在
中,
,
,
,
为边
上一动点,
于
,
于
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f325403cbedaac249c9a78d33da81a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2af439304fcef24d29b40ef3366b25a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d2f892a652efbfff1de7dac42e977e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fb30a9d07e410ac92c34b8ad0133db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca0940f5c21431c089d4f7a221df43c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/590e589a-9d49-4e7a-8838-abdc16f92439.png?resizew=193)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
6 . 如图,在正方形
中,
,点E是
边上一点,且
,连接
,点F是
边上一点,过点F作
交
于点G,连接
,
,
,则四边形
的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/620bc4cfb53594c834b9afcbc3de516a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82d3a004c4f6c29bd52364eb658c704b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f875de8bec0ffc84b8142f81080058.png)
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真题
7 . 如图,点A、B在x轴上,分别以
,
为边,在x轴上方作正方形
,
.反比例函数
的图象分别交边
,
于点P,Q.作
轴于点M,
轴于点N.若
,Q为
的中点,且阴影部分面积等于6,则k的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f14c88a2d38002254d1680dabde29e98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a8b6fe6b9add4a965ac32c1fc51c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3a3db6d96518255f96ad7fc1ac98f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a414a51821983fda71dc9a901323dff6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
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2023-10-19更新
|
1654次组卷
|
10卷引用:山西省朔州市右玉县右玉教育集团初中部2023-2024学年九年级上学期期中数学试题
山西省朔州市右玉县右玉教育集团初中部2023-2024学年九年级上学期期中数学试题2023年浙江省衢州市中考数学真题浙江省2023年初中学业水平考试数学试题 衢州卷)陕西省西安市高新区第三初级中学2023-2024学年九年级上学期第二次月考数学试题重庆市武隆区2023-2024学年九年级上学期期末数学试题(已下线)第8讲 正方形浙江省温州市瓯海区外国语集团学校2023--2024学年九年级第一次适应性考试数学模拟试题(已下线)专题11.7 反比例函数的图象与性质(直通中考)(基础练)-2023-2024学年八年级数学下册基础知识专项突破讲与练(苏科版)(已下线)专题11 反比例函数(考点回归+练透中考7类核心重点考向)-备战2024年中考数学真题题源解密(全国通用)(已下线)热点04+一次函数与反比例函数2(12大题型+满分技巧+限时分层检测)-2024年中考数学【热点·重点·难点】专练(全国通用)
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8 . 实践与探究:
问题情景:数学实践课上,老师让同学们以平行四边形为主题展开数学活动.
如图,
中,
,
,
.对角线
、
相交于点
,将直线
绕点
顺时针旋转
,分别交直线
、
于点
、
.
(1)操作发现:当
______时,四边形
是平行四边形;
(2)思考表达:在旋转的过程中,四边形
可能是菱形吗?如果能,求出此时
的值;如果不能,说明理由;
(3)拓展延伸:在旋转过程中,是否存在以
、
、
、
、
、
中的4个点为顶点的四边形是矩形?如果存在,直接写出矩形的对角线的长度;如果不存在,说明理由.
问题情景:数学实践课上,老师让同学们以平行四边形为主题展开数学活动.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fc9f894312e55c87a0d6737080e233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/23/986ba1a1-1ff7-4731-a53c-af2ba0fefdb4.png?resizew=362)
(1)操作发现:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9251dff989f7d60db751b73033dee269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
(2)思考表达:在旋转的过程中,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2330c01a4d2b5b20f106e3e48834d5c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)拓展延伸:在旋转过程中,是否存在以
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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9 . 阅读与思考:
小明同学在学习矩形性质之后,对直角三角形的性质“直角三角形斜边上的中线等于斜边的一半”的证明思路做了及时的梳理与总结.阅读小明同学的笔记,并完成相应任务
任务:
(1)①依据为:______________
(2)请补小明的全证明过程;
(3)上述证明方法中主要体现的数学思想是______;
A.转化思想 B.类比思想 C.数形结合思想 D.从一般到特殊思想
(4)将
和
按图3放置,其中
,
,点A、B、D在一直线上,分别取
和
的中点F和G,连接GF.若
,
,
,则
______.
小明同学在学习矩形性质之后,对直角三角形的性质“直角三角形斜边上的中线等于斜边的一半”的证明思路做了及时的梳理与总结.阅读小明同学的笔记,并完成相应任务
直角三角形斜边上的中线等于斜边的一半 如图1, ![]() ![]() ![]() ![]() ![]() ![]() 分析:要证明 ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() 证明:延长 ![]() ![]() ![]() ![]() ![]() ∵ ![]() ![]() ∴ ![]() 又∵ ![]() ∴四边形 ![]() |
(1)①依据为:______________
(2)请补小明的全证明过程;
(3)上述证明方法中主要体现的数学思想是______;
A.转化思想 B.类比思想 C.数形结合思想 D.从一般到特殊思想
(4)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab34c8e368a7a2346a3922f5c532823d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd66f89184ca925f4575c26053decf2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8bb0ccb6920e6a31cc8bcfe1e8c1a0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f1f15400d48e7b756e87e3f566aabe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/18/db1633ce-fcad-4f2b-b647-6f964e732929.png?resizew=185)
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10 . 图
是某小区门口的车辆自动识别系统,主要有可旋转高清摄像机和其下方固定的显示屏
图
是其结构示意图,摄像机长
,点
是摄像机旋转轴心,
为
的中点,显示屏的上沿
与
平行,
,
的连接杆为
,
,
,
,点
到地面的距离为
,若
与水平地面所成的角的度数为
请根据以上数据求镜头
到地面的距离.
参考数据:
,
,
,结果保留一位小数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739c4d0dc2cac3bfd94a87f1d0d0633b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efeac524f12d236f4a0e1ff9c8d0123f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178e3fa2e4de57a4c067e79be7d798e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011205e7d4a723d966bff30912b43643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795e740cb57615d48c36b416d5b93a9c.png)
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