名校
解题方法
1 . 如图①,在菱形
中,
,将
沿对角线
翻折(如图②),则在翻折的过程中,下列选项中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e77db8e97cf0910fec52f526d0e4b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb961bd7db3adb76af2d4cedb611bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
A.存在某个位置,使得![]() |
B.存在某个位置,使得![]() |
C.存在某个位置,使得点![]() ![]() ![]() |
D.存在某个位置,使得![]() ![]() |
您最近一年使用:0次
2022-11-24更新
|
893次组卷
|
4卷引用:山东省实验中学2022-2023学年高三第二次诊断考试数学试题
名校
解题方法
2 . 如图,已知长方体
的棱长
,
,则点A到棱
的距离是______ cm.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0dc6026c1fa5aaf232afd55c1e55ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df3b2901ad26337818f75e81448ebb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
您最近一年使用:0次
名校
3 . 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:安徽省合肥市第十中学2022-2023 学年高三上学期学情检测一数学试题
名校
4 . 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
5 . 《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
6 . 设有下列四个命题:
:两两相交且不过同一点的三条直线必在同一平面内.
:过空间中任一点有且仅有一个平面.
:若空间两条直线不相交,则这两条直线平行.
:若直线
平面
,直线
平面
,则
.
则上述命题中( )是真命题.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be646cd52d7f2f1714e7542e75810f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b21b872313f7d8c5b606981f954a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc119550ce4fc5f3d1daf996e7243bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e0019e49f673a3b11a4259ce3c9a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f979a27d3a09a17445561091e6655eb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb26a220ed44c446105df7caa0f1063.png)
则上述命题中( )是真命题.
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
7 . 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:江西省南昌市2021届高三二模数学(文)试题
名校
8 . 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
9 . 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
10 . 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