名校
1 . 如图,三棱柱
的侧棱与底面垂直,
,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/2022/9/11/3064419340214272/3064754319769600/STEM/f52bca12f2c74f7f92f98ac4cde795c9.png?resizew=215)
(1)求证:
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6dfcb0a6104a9be3ee2d8e4c9e5991b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2022/9/11/3064419340214272/3064754319769600/STEM/f52bca12f2c74f7f92f98ac4cde795c9.png?resizew=215)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4cdc3a083d1263634d510f172dab09.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc7e774e4ae40c23bf4ceed179230ca.png)
您最近一年使用:0次
2022-09-12更新
|
3852次组卷
|
6卷引用:山东省潍坊高密市第三中学2022-2023学年高二上学期9月月考数学试题
名校
2 . 如图,在四棱锥
中,侧面
是边长为
的正三角形且与底面垂直,底面
是菱形,且
,
为棱
上的动点,且
.
![](https://img.xkw.com/dksih/QBM/2022/9/2/3057811122692096/3057845507432448/STEM/571fea07919a4b8789b6a773132ad9e7.png?resizew=189)
(1)求证:
为直角三角形;
(2)试确定
的值,使得平面
与平面
夹角的余弦值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fceddfa42f8cac1903c31d822cc1d66e.png)
![](https://img.xkw.com/dksih/QBM/2022/9/2/3057811122692096/3057845507432448/STEM/571fea07919a4b8789b6a773132ad9e7.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
(2)试确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb7c2ca1b6bee86cb24fed02e40da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
您最近一年使用:0次
2022-09-02更新
|
2391次组卷
|
2卷引用:2023版 湘教版(2019) 选修第二册 过关斩将 第2章 2.4.3 向量与夹角
解题方法
3 . 《九章算术》是我国古代数学名著,其中提到的“阳马”是指底面为矩形,有一侧棱垂直于底面的四棱锥.在阳马
的表面三角形中,直角三角形的个数为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
名校
解题方法
4 . 如图,菱形
的边长为6,对角线交于点
,
,将
沿
折起得到三棱锥
,点
在底面
的投影为点
.
![](https://img.xkw.com/dksih/QBM/2021/4/27/2708935073275904/2710416684392448/STEM/0e27a404-f73a-4824-8f9a-429bbfbf6404.png?resizew=543)
(1)求证:
;
(2)当
为
的重心时,求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13c772461aef1d9d715129636739748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2021/4/27/2708935073275904/2710416684392448/STEM/0e27a404-f73a-4824-8f9a-429bbfbf6404.png?resizew=543)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
您最近一年使用:0次
2021-04-29更新
|
831次组卷
|
2卷引用:四川省乐山沫若中学2022-2023学年高二上学期第二次月考(期中考试)数学(文)试题
名校
5 . 如图,已知正三棱柱
的各棱长都是4,E是
的中点,动点F在侧棱
上,且不与点C重合.
![](https://img.xkw.com/dksih/QBM/2021/4/14/2699762718539776/2699808526712832/STEM/da74b6bcaea7413a861b5b658bfed124.png?resizew=162)
(Ⅰ)当
时,求证:
;
(Ⅱ)设二面角
的大小为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2021/4/14/2699762718539776/2699808526712832/STEM/da74b6bcaea7413a861b5b658bfed124.png?resizew=162)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3362a45b72536c714c5107b0ae94f1c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca08229da992fdd08d6cb1efeb469b1.png)
(Ⅱ)设二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01cca53693e4bc901899f3360d21618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
您最近一年使用:0次
名校
解题方法
6 . 在三棱锥
中,
,
,
,二面角
,
,
的大小均为
,设三棱锥
的外接球的球心为
,直线
交平面
于点
,则
的值为 ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7fe637f1537666932491637f9b3d3ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bef3a2b3b1ca1a8dce50114e893599e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a5d8831a9bef0f3d882d97d28e6d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb52e40eee341da66ed7c87a833b8ec.png)
A.![]() | B.1 | C.![]() | D.2 |
您最近一年使用:0次
名校
7 . 在如图所示的三棱锥V—ABC中,已知AB=BC,∠VAB=∠VAC=∠ABC=90°,P为线段VC的中点,则( )
![](https://img.xkw.com/dksih/QBM/2021/1/17/2638247125409792/2638974401667072/STEM/fd015704-b1cd-475f-b002-dd4b07b42e45.png?resizew=205)
![](https://img.xkw.com/dksih/QBM/2021/1/17/2638247125409792/2638974401667072/STEM/fd015704-b1cd-475f-b002-dd4b07b42e45.png?resizew=205)
A.PB与AC垂直 |
B.点P到点A,B,C,V的距离相等 |
C.PB与VA平行 |
D.PB与平面ABC所成的角大于∠VBA |
您最近一年使用:0次
2021-01-18更新
|
257次组卷
|
2卷引用:江苏省无锡市南菁高级中学2020-2021学年高二上学期12月阶段性考试数学试题
19-20高一·浙江杭州·期末
名校
解题方法
8 . 如图,矩形
中,
,E为边
的中点,将
沿直线
翻折成
.若M为线段
的中点,则在
翻折过程中,下面四个选项中正确的是______ (填写所有的正确选项)
(1)
是定值
(2)点M在某个球面上运动
(3)存在某个位置,使![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2181c78134c310f746eab44b9124e63b.png)
(4)存在某个位置,使
平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/17/49c45696-902c-4380-a480-fc6d28cf58aa.png?resizew=208)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c2f99ac2b6bc91b983628b68a5cd0d.png)
(2)点M在某个球面上运动
(3)存在某个位置,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2181c78134c310f746eab44b9124e63b.png)
(4)存在某个位置,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c70966a318ef8ecf874257f5c5e5db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
您最近一年使用:0次
2020-11-30更新
|
1080次组卷
|
5卷引用:浙江省杭州市第四中学2020-2021学年高二上学期期中数学试题
9 . 若直线
平面
,直线
平面
,则直线a与直线b的位置关系为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0967ca2d04a7da2f6c95e0efe07fe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe623bd25476a860fa4c2a179b81464.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.异面 | B.相交 | C.平行 | D.平行或异面 |
您最近一年使用:0次
2020-11-27更新
|
2233次组卷
|
12卷引用:四川省蓉城名校联盟2020-2021学年高二第一学期期中联考理科数学试题
四川省蓉城名校联盟2020-2021学年高二第一学期期中联考理科数学试题四川省成都市蓉城名校联盟2020-2021学年高二(高中2019级)上学期期中联考文科数学试题(已下线)一轮复习适应训练卷(5)-2022年暑假高二升高三数学一轮复习适应训练卷 全国通用 四川省成都市2020-2021学年高二上学期期中数学理科试题(已下线)考点27 空间直线、平面的垂直-备战2021年新高考数学一轮复习考点一遍过(已下线)专题11.3空间中的垂直关系(A卷基础篇)-2020-2021学年高一数学必修第四册同步单元AB卷(新教材人教B版)甘肃省武威市民勤县第四中学2020-2021学年高一上学期期末考试(实验班)数学试题甘肃省武威市民勤县第四中学2020-2021学年高一上学期期末考试(普通班)数学试题(已下线)第13章 立体几何初步(基础卷)-2020-2021学年高一数学十分钟同步课堂专练(苏教版2019必修第二册)(已下线)第13章 立体几何初步(能力提升)-2020-2021学年高一数学单元测试定心卷(苏教版2019必修第二册)(已下线)8.6.2直线与平面垂直的性质定理(第2课时)(精讲)(1)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)6.5垂直关系- 2020-2021学年高一数学北师大版2019必修第二册
名校
解题方法
10 . 如图,圆柱的轴截面
是正方形,点
是底面圆周上异于
的一点,
,
是垂足.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/0944bc73-af3d-4f0b-8a26-95b1ca887fa2.png?resizew=148)
(1)证明:
;
(2)若
,当三棱锥
体积最大时,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876bb8ce0ca53475fa091ffd18bdc94a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/0944bc73-af3d-4f0b-8a26-95b1ca887fa2.png?resizew=148)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e3d90003d6940c8e9e90916172ba97.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2daa808ca8c95f282dae5e1d578cb65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
2020-11-20更新
|
1139次组卷
|
5卷引用:云南师范大学附属中学呈贡校区2020—2021学年高二上学期第一学段模块考试(期中考试)试题