名校
1 . 已知圆锥的母线长
为4,侧面积为S,体积为
,则
取得最大值时圆锥的侧面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba9638ee1a002ea8ba393eefd876c57.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-09-07更新
|
359次组卷
|
2卷引用:安徽省皖江名校联盟2020届高三第一次联考试题(8月) 数学(理科)
名校
解题方法
2 . 如图,高为
的等腰梯形
中,
为
的三等分点.现将
沿
折起,使平面
平面
,连接
,点
为
边上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/af80cd35-d490-4e30-8672-a3d8c36fb131.png?resizew=389)
(1)当
时,求证:
平面
;
(2)当点
为边
的中点时,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84830d8a04568c6458452719e34bc5fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/101da161ae17652ccbe7d3f888762c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb23a04ac9df27fb987126e7ba0f6c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b704ddc39c50386673eaf3ed504d03c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/af80cd35-d490-4e30-8672-a3d8c36fb131.png?resizew=389)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f79744404aff0091e4e0682bd403d605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/915378d4464da1b869c16e0ee8a57a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fcce61c3d158b5331d6de10db3fb55d.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fcce61c3d158b5331d6de10db3fb55d.png)
您最近一年使用:0次
2017·全国·一模
解题方法
3 . 若正四棱锥
内接于球
,且底面
过球心
,设正四棱锥
的高为
,则球
的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
4 . 在平行四边形ABCD中,
,
,
,若将其沿BD折成直二面角A-BD-C,则三棱锥A-BDC的外接球的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09ceef47dfdbdb1b586806fa27271d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f0a670dc8ddbe042b00ff730cbae1d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347fe4857114e48a246045f1ce583904.png)
A.16π | B.8π | C.4π | D.2π |
您最近一年使用:0次
5 . 一个几何体的三视图及其尺寸如图所示,则该几何体的体积为
![](https://img.xkw.com/dksih/QBM/2017/3/30/1654874284843008/1654917615681536/STEM/1d0c9178110440d18465a5262a7e2590.png?resizew=173)
![](https://img.xkw.com/dksih/QBM/2017/3/30/1654874284843008/1654917615681536/STEM/1d0c9178110440d18465a5262a7e2590.png?resizew=173)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-03-30更新
|
1415次组卷
|
4卷引用:2017届安徽省合肥市高三第二次教学质量检测理科数学试卷
2017届安徽省合肥市高三第二次教学质量检测理科数学试卷 (已下线)安徽省合肥市2017届高三第二次教学质量检测理数试题湖北武汉市蔡甸区汉阳一中2017届高三第三次模拟考试数学(理)试题重庆市外国语学校2019-2020学年高三下学期4月月考数学(理)试题
6 . 如图,在梯形
中,
,
,
,四边形
是正方形,且
,点
在线段
上.
![](https://img.xkw.com/dksih/QBM/2019/6/17/2227751920771072/2228075721195520/STEM/8d68d02a6d194a89b380184604e0e1a9.png?resizew=198)
(Ⅰ)求证:
平面
;
(Ⅱ)当
平面
时,求四棱锥
的体积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37591109b0a0ec5ffe2133f83310eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f841c80511eeb80156d2eba7932851c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07ccb789aac3563a4b788b3d24eb183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/2019/6/17/2227751920771072/2228075721195520/STEM/8d68d02a6d194a89b380184604e0e1a9.png?resizew=198)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a1350c36585d2146df15593846f3330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa74d02d6fd3ccf676b8cd73920b107.png)
您最近一年使用:0次
2018-12-24更新
|
530次组卷
|
6卷引用:【校级联考】安徽省江淮名校2019届高三12月联考数学(理科)试题
解题方法
7 . 四棱锥P-ABCD中,ABCD是正方形,
,且面
面ABCD,则四棱锥P-ABCD的外接球表面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168d00ab3df02ba97fa060108249e120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
8 . 已知正三棱柱
的六个顶点都在球O的球面上,
,
,则球O的表面积为_________________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
您最近一年使用:0次
9 . 已知
,
,
,
是同一球面上的四个点,
中,
,
,
平面
,
,
,则该球的表面积为______ .
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
您最近一年使用:0次
名校
10 . 如图,是一块木料的三视图,将它经过切削,打磨成半径最大的球,则该木料最多加工出球的个数为
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/a84bfa6c-461a-4395-8b0a-c7c7b126a9f6.png?resizew=171)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/a84bfa6c-461a-4395-8b0a-c7c7b126a9f6.png?resizew=171)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2019-05-19更新
|
393次组卷
|
5卷引用:安徽省江淮十校2019届高三年级5月考前最后一卷数学理科试题