浙江省宁波市慈溪市2020-2021学年九年级上学期期末数学试题
浙江
九年级
期末
2021-02-10
439次
整体难度:
容易
考查范围:
图形的变化、统计与概率、函数、图形的性质、方程与不等式、数与式
一、单选题 添加题型下试题
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 判断由一个图形旋转而成的图案解读
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/05784704-9e24-44a0-9d64-352bbd3ae4ad.png?resizew=127)
A.18 | B.20 | C.25 | D.30 |
【知识点】 由平行判断成比例的线段解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/355bc0d6058a3dd1254ff395176ec55b.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/23/a115e907-bda2-42d4-928e-bd1a20f51a26.png?resizew=142)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 勾股定理与网格问题解读 求特殊角的三角函数值解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd6ffb78dad3375efa3b08ab518553d.png)
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645192490156032/2646805153030144/STEM/29abbd546ed64571ad63a01db902ecce.png?resizew=132)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 等腰三角形的性质和判定 垂径定理的实际应用解读 求弧长解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb0aa8a61380228e285f3b5c7b74c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b14b9c16c50af9af5da2d10be3a023a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87796ee30e6c5d5e6b6285b32abe10c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea2a2b255db6e9756bf0708aa1deab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d334ad224b85ce9655518cc522aeeed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38221d0533d59b1354605ff0c050254.png)
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645192490156032/2646805153054720/STEM/ed3fc6ff-067b-43cc-8f96-df196c661be9.png?resizew=263)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 其他问题(解直角三角形的应用)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2b8f4eac430c205fca37f61f6924603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a92f95c3f4ae538f60ef7d51b848d197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f9e109b68fcbe5a650374aa1da36e50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398d4f9dd3335037678f03aba1db5ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/462d7f7a-d407-40d8-9635-69cb3d7ace91.png?resizew=280)
A.![]() | B.![]() | C.![]() ![]() | D.![]() ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c60a1a418c44637b83782d0d21dbf052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4ff0af96ea467337cb30c4c765b5f7.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/e34bef33a1a9cf657e476481a467ab76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/292924b51f9f52524a9e4cfff8d48fb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/cdbdb9da-521e-4896-9f5b-d17614a7709c.png?resizew=200)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 因式分解法解一元二次方程解读 其他问题(二次函数综合)
二、填空题 添加题型下试题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4722e78001492d2ef9ea2ce09ca83087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/1/67598772-9a32-42f9-b8a3-6c1210c2cd44.png?resizew=134)
【知识点】 求角的余弦值
摸球的次数![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
摸到白球的次数![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
摸到白球的频率![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1926eb08a21a8b6558fcfd4c52a4a23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5db9fa0bc36e2308bd3eecd5e78351.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5db9fa0bc36e2308bd3eecd5e78351.png)
【知识点】 关于频率与概率关系说法的正误解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c41e921734694f53b250b16b8926249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e7553371018fde581b9c676c978551.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98f56dbd8f8139a9959e20e8631829ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a822bf4eba366705b5b7ba7fc389234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9314bd1d7a6e070f4f2428f9a321804e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/470188227583e323476d3d0208e9b59b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be7eb759c8330fcad3daaa2d5afdf979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e470b9b1ab6b8db7d19dc1e48ad6f09b.png)
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645192490156032/2646805153226752/STEM/8d59c7c0-beac-4086-94f4-4865eb426803.png)
【知识点】 利用弧、弦、圆心角的关系求解解读 圆周角定理解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/c9ea8791-9be5-400b-a961-579d8d5b6b6f.png?resizew=279)
【知识点】 相似三角形的判定与性质综合
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/5/137b6ac4-dd56-4a74-80ef-ff6279d191dd.png?resizew=333)
三、解答题 添加题型下试题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e22ca775f0764a707247e172683b7e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48626e987ead2acf185cea367b0ce9e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74b2462d0d9722ea093baa8dfba44c10.png)
【知识点】 比例的性质解读 特殊角三角函数值的混合运算解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46abf9fa0ac52e352dc0eec7a352d577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/3366ac1a-3b41-4802-b177-6266ec556253.png?resizew=252)
(1)与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
【知识点】 在网格中画与已知三角形相似的三角形解读
![](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)
(1)求小丽通过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)利用画树状图或列表的方法,求小丽和小聪从两个不同通道进入校园的概率(要求画出树状图或表格).
【知识点】 根据概率公式计算概率解读 列表法或树状图法求概率解读
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/7/fffe0d30-325b-4b44-b539-8e9c1d0997ae.png?resizew=299)
(1)若α=56°,求点A离地面的高度AE;(参考值:sin62°=cos28°≈0.88,sin28°=cos62°≈0.47,tan62°≈1.88,tan28°≈0.53)
(2)调节α的大小,使A离地面高度AE=125cm时,求此时C点离地面的高度CF.
【知识点】 相似三角形的判定与性质综合 其他问题(解直角三角形的应用)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49e60fbe6820130fb20abc555a94b5ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645192490156032/2646805153390592/STEM/3db1da5052f749908db6805a47873638.png?resizew=210)
(1)求下列情形下养鸡场的面积的最大值;
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efbebc3df0e44aaf7c04feebcf5d70dd.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825793ebd4bb376a09621f163ac990a9.png)
(2)若可围成的矩形养鸡场的面积的最大值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0972ba2d5700b123fae4b219cabfe1c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
【知识点】 其他问题(实际问题与二次函数)
![](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/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/5bb12d9cbf4d45e8efc4f53c41e2d932.png)
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645192490156032/2646805153406976/STEM/dea3eb7886824471b043e8fa8bdeca21.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e4d19bf237a6fca67e0d01a9ddb726.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae589f647c8864f89d5610fb28158315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c97ea8e6eac1fc0c3087cea2d412d87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
【知识点】 求其他不规则图形的面积 圆与三角形的综合(圆的综合问题)
![](https://img.xkw.com/dksih/QBM/2021/3/8/2673223644135424/2674372713840640/STEM/9b5d68b9d1144d2faab05422d273ce52.png?resizew=201)
(1)求该二次函数表达式;
(2)判断△ABC的形状,并说明理由;
(3)P为第一象限内该二次函数图象上一动点,过P作PQ∥AC,交直线BC于点Q,作PM∥y轴交BC于M.
①求证:△PQM∽△COA;
②求线段PQ的长度的最大值.
【知识点】 证明两三角形相似解读 相似三角形问题(二次函数综合)
![](https://img.xkw.com/dksih/QBM/2021/3/8/2673223644135424/2674372713857024/STEM/26df5b50-8b0f-455c-bcc5-4d4aba4fd838.png?resizew=521)
(1)如图1,①求证:点P为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb882b525043fb4602f598a9dfe5fbe.png)
②求sin∠BAC的值;
(2)如图2,若点A为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf1348c881493abf65fa65aa05053545.png)
(3)若△ABC为非锐角三角形,求PA•AE的最大值.
试卷分析
试卷题型(共 24题)
试卷难度
知识点分析
细目表分析 导出
题号 | 难度系数 | 详细知识点 | 备注 |
一、单选题 | |||
1 | 0.85 | 判断由一个图形旋转而成的图案 | |
2 | 0.85 | 概率的意义理解 | |
3 | 0.85 | 二次函数图象的平移 | |
4 | 0.85 | 正多边形和圆的综合 | |
5 | 0.85 | 由平行判断成比例的线段 | |
6 | 0.85 | 勾股定理与网格问题 求特殊角的三角函数值 | |
7 | 0.85 | 等腰三角形的性质和判定 垂径定理的实际应用 求弧长 | |
8 | 0.85 | 其他问题(解直角三角形的应用) | |
9 | 0.85 | 相似多边形的性质 | |
10 | 0.85 | 因式分解法解一元二次方程 其他问题(二次函数综合) | |
二、填空题 | |||
11 | 0.85 | 求角的余弦值 | |
12 | 0.85 | 关于频率与概率关系说法的正误 | |
13 | 0.94 | y=ax²+bx+c的图象与性质 根据二次函数的对称性求函数值 | |
14 | 0.85 | 利用弧、弦、圆心角的关系求解 圆周角定理 | |
15 | 0.65 | 相似三角形的判定与性质综合 | |
16 | 0.65 | 完全平方公式在几何图形中的应用 根据正方形的性质与判定求面积 相似三角形的判定与性质综合 | |
三、解答题 | |||
17 | 0.85 | 比例的性质 特殊角三角函数值的混合运算 | 计算题 |
18 | 0.85 | 在网格中画与已知三角形相似的三角形 | 问答题 |
19 | 0.85 | 根据概率公式计算概率 列表法或树状图法求概率 | 作图题 |
20 | 0.65 | 相似三角形的判定与性质综合 其他问题(解直角三角形的应用) | 问答题 |
21 | 0.65 | 其他问题(实际问题与二次函数) | 问答题 |
22 | 0.65 | 求其他不规则图形的面积 圆与三角形的综合(圆的综合问题) | 证明题 |
23 | 0.4 | 证明两三角形相似 相似三角形问题(二次函数综合) | 证明题 |
24 | 0.4 | 相似三角形的判定与性质综合 解直角三角形的相关计算 圆与四边形的综合(圆的综合问题) | 证明题 |