1 . 圆
的半径为
,
为圆周上一点,现将如图放置的边长为
的正方形(实线所示 ,正方形的顶点
和点
重合)沿着圆周顺时针滚动,经过若干次滚动,点
第一次回到点
的位置,则点
走过的路径的长度为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://img.xkw.com/dksih/QBM/2015/6/4/1572120384864256/1572120390885376/STEM/500c16ffc421485eb47c38402e018e3d.png?resizew=149)
您最近一年使用:0次
2016-12-03更新
|
622次组卷
|
6卷引用:上海市浦东新区2019年高三下学期三模试卷数学试题
2 . 如图所示,某传动装置由两个陀螺
,
组成,陀螺之间没有滑动,每个陀螺都由具有公共轴的圆锥和圆柱两个部分构成,每个圆柱的底面半径和高都是相应圆锥底面半径的
,且
,
的轴相互垂直,它们相接触的直线与
的轴所成角
,若陀螺
中圆锥的底面半径为
(
);
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/44a822b3-0a30-4f6b-bccd-69ac6b2c1d62.png?resizew=216)
(1)求陀螺
的体积;
(2)当陀螺
转动一圈时,陀螺
中圆锥底面圆周上一点
转动到点
,求
与
之间的距离;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9a724b59c890095baa5cb73e267c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9275bd8ce17fcc4a786510b008414ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9a724b59c890095baa5cb73e267c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9275bd8ce17fcc4a786510b008414ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9275bd8ce17fcc4a786510b008414ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6812ad2f71f945d641ed56c4bddc5a60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9275bd8ce17fcc4a786510b008414ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ba6b6aa6c3f9faba6b03bc193a6e61.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/44a822b3-0a30-4f6b-bccd-69ac6b2c1d62.png?resizew=216)
(1)求陀螺
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9275bd8ce17fcc4a786510b008414ab0.png)
(2)当陀螺
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9275bd8ce17fcc4a786510b008414ab0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9a724b59c890095baa5cb73e267c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
您最近一年使用:0次
2020-01-14更新
|
144次组卷
|
2卷引用:上海市南模中学2017-2018学年高三上学期开学考数学试题
12-13高三上·上海闵行·期末
名校
3 . 已知扇形的面积为
,半径为1,则该扇形的圆心角的弧度数是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8b2d44bb3474601fec5a1503ef27a0.png)
您最近一年使用:0次
2019-01-30更新
|
385次组卷
|
3卷引用:2012届上海市闵行区高三上学期期末质量抽测理科数学试卷
(已下线)2012届上海市闵行区高三上学期期末质量抽测理科数学试卷重庆市礼嘉中学2020-2021学年高一上学期12月月考数学试题黑龙江省齐齐哈尔市龙江二中2019-2020学年高一上学期12月月考数学(理)试题
解题方法
4 . 如图是集合P={(x,y)|(x﹣cosθ)2+(y﹣sinθ)2=4,0≤θ≤π}中的点在平面上运动时留下的阴影,中间形如“水滴”部分的平面面积为
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464759037952/1572464765091840/STEM/3c739e06c95c41449d08121c71090fc3.png)
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464759037952/1572464765091840/STEM/3c739e06c95c41449d08121c71090fc3.png)
A.![]() | B.![]() |
C.![]() | D.π+2 |
您最近一年使用:0次
名校
5 . 已知扇形的半径为
,周长为
,则其面积为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da165d3d3de8812ab633e6276ed907b7.png)
您最近一年使用:0次
名校
6 . 如图,扇环ABCD的两条弧长分别为
和
扇环的两条边AD和BC的长都是
,则此扇环的面积为________ (用
和
表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc99f590764fec8cf73ca22b012e2ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50297ad9f7256b4d2efc3462289f18b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/0e45ce3a-854e-43c3-9828-fc972daaa83c.png?resizew=142)
您最近一年使用:0次
7 . 一个圆锥的侧面展开图是圆心角为
,半径为
的扇形,则此圆锥的体积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4966e5af166b69a0a38a98abf555b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba48323cd79d207715e82d1e5a7d5e8.png)
您最近一年使用:0次
2011·上海静安·一模
8 . 如图,用半径为
cm,面积为
cm2的扇形铁皮制作一个无盖的圆锥形容器(衔接部分忽略不计),该容器最多盛水多少?(结果精确到0.1cm3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa0199c2165defca15cdf44249b0fd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74dafe5bdaa25ec46bac928980ea125e.png)
![](https://img.xkw.com/dksih/QBM/2011/5/6/1570182210019328/1570182214975488/STEM/8b4fdb91dd6c4312bd8f8878858fefaf.png?resizew=225)
您最近一年使用:0次