名校
1 . 如图,在四棱锥
中,
,
,
,
分别为
,
的中点,点
在
上,且
为三角形
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/be2f946a-007a-4b6e-8ffd-595c6aeeac66.png?resizew=150)
(1)证明:
平面
;
(2)若
,
,四棱锥
的体积为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ace2e7a06f88abee94e184425bcffc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f79269ce8bf4b83a02d6ff0237d83a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/be2f946a-007a-4b6e-8ffd-595c6aeeac66.png?resizew=150)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2acc0a557ea7a2eded16ef716dbd1038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b44f4120c94cb7176dc31fcac387b32e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2023-04-26更新
|
1489次组卷
|
3卷引用:河南省名校青桐鸣2023届高三下学期4月联考理科数学试题
名校
解题方法
2 . 如图,在三棱锥
中,
.
平面BCD;
(2)若
,当直线AB与平面ACD所成的角最大时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2eaaee119b066e4d8cb6b049ac33a5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9513c2dc95253d5c241083636393d536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
您最近一年使用:0次
2023-04-16更新
|
458次组卷
|
3卷引用:河南省TOP二十名校2022-2023学年高三下学期四月冲刺考(一)理科数学试题
3 . 如图,在三棱锥
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/23bb19bd-8ad3-47f4-b9df-c9b2c1ecbce2.png?resizew=134)
(1)证明:平面
平面
;
(2)设
,
为
的中点,
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e320a45fdb0f3339eff27dd0c608117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a83ed45064ec6e16c0024adfc8e2804.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/23bb19bd-8ad3-47f4-b9df-c9b2c1ecbce2.png?resizew=134)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ad8d16722f5b9e7fd2602f14d5ffbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae48b99ccd7d4e533919127bbc12613d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
您最近一年使用:0次
2023-04-16更新
|
1183次组卷
|
3卷引用:河南省TOP二十名校2022-2023学年高三下学期四月冲刺考(一)文科数学试题
4 . 在四棱锥
中,四边形ABCD为等腰梯形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/c160c23a-8eb4-4598-81ce-109703e9b38c.png?resizew=138)
(1)证明:平面
平面PBC.
(2)若
,
,求点D到平面PBC的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b09f34fb06ae90a8d7b1a25ea01645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e766e52e5f64705a847ff1dbaba69c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/c160c23a-8eb4-4598-81ce-109703e9b38c.png?resizew=138)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0063f3f48e49f2970ec7f097567cef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58bbc02479917ad761a24eaae0dbfd9.png)
您最近一年使用:0次
名校
解题方法
5 . 如图,在四棱柱
中,底面ABCD为平行四边形,
,∠BAD=60°,平面
平面ABCD,
,
,E为
上的一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/1ec01047-528c-4178-8d1c-2921ce61bf89.png?resizew=149)
(1)求证:
平面
;
(2)若
平面BDE,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f21c7c194c5bc2986a21fd441c81495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ff92a552f29d890125165c894db126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd998da9883988f6f4e93682797a3a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4319d3be7a478c1eab8501d1840bd6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/1ec01047-528c-4178-8d1c-2921ce61bf89.png?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f856654f9deb4c1a04e920983278c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ebd12bb81c587ff46fa6bd1e4eb060.png)
您最近一年使用:0次
名校
解题方法
6 . 在四棱锥Q-ABCD中,底面ABCD是正方形,若AD=2,
,QC=3.
(2)若点P为四棱锥Q-ABCD的侧面QCD内(包含边界)的一点,且四棱锥P-ABCD的体积为
,求BP与平面ABCD所成角的正弦值的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3d0f667ef7ca851f514f2e742a8624.png)
(2)若点P为四棱锥Q-ABCD的侧面QCD内(包含边界)的一点,且四棱锥P-ABCD的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
您最近一年使用:0次
2023-04-08更新
|
446次组卷
|
2卷引用:河南省部分学校2023届高三高考仿真适应性测试理科数学试题
7 . 在四棱锥Q-ABCD中,底面ABCD是正方形,若
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/e87c7abe-6fde-4b36-8a0b-b7bfebd50666.png?resizew=180)
(1)证明:平面
⊥平面
;
(2)求四棱锥
的体积与表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3d0f667ef7ca851f514f2e742a8624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a512bcb83a2e952d2f1f877f1ceaa5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/e87c7abe-6fde-4b36-8a0b-b7bfebd50666.png?resizew=180)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40cae1138ce408cf7ebbe14f152d6e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c6caa0455442437177ab9b995df37b.png)
您最近一年使用:0次
解题方法
8 . 如图所示,四棱柱
中,
平面
,
,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/7/a858cdd7-b54f-47bd-a4be-63a00e170c76.png?resizew=187)
(1)若四边形
为平行四边形,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
平面
;
(2)若点F在BD上,
,
,
,
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6ab0386dde0643de8caf33f946072f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd5a4fffd24f8f66d680811e6ffcbf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f182c605c5b0c7e50b2cf2596d50d1c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/7/a858cdd7-b54f-47bd-a4be-63a00e170c76.png?resizew=187)
(1)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
(2)若点F在BD上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d459cad63e3cd2aba10862800fa4832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78192b9e9d4e38175e840233749443bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545be1051b20aea348bc99505c27022.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96b5cd06f51fe01e8289f95033f36ab.png)
您最近一年使用:0次
2023-04-06更新
|
285次组卷
|
2卷引用:河南省郑州市等2地2023届高三下学期3月冲刺(一)文科数学试题
9 . 在如图所示的几何体中,四边形ABCD为菱形,
,
,
,
,
,点F在平面ABCD内的射影恰为BC的中点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/ba831ba5-1826-4024-8a16-eceb84a4b1b6.png?resizew=234)
(1)求证:平面
平面BED;
(2)求该几何体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ec435aa1401dbce7863b531bf2f3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117878cbd8c00f2aabcdf62b487e2dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60572975f9ac06ffc8d98ef94de49eb0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/3/ba831ba5-1826-4024-8a16-eceb84a4b1b6.png?resizew=234)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.png)
(2)求该几何体的体积.
您最近一年使用:0次
2023-04-02更新
|
758次组卷
|
3卷引用:河南省安阳市2023届高三第二次模拟考试文科数学试题
河南省安阳市2023届高三第二次模拟考试文科数学试题第13章 立体几何初步(A卷·基础提升练)-【单元测试】2022-2023学年高一数学分层训练AB卷(苏教版2019必修第二册)(已下线)期末复习07 空间几何线面、面面垂直-期末专项复习
10 . 如图,在四棱锥
中,底面四边形ABCD为矩形,
,
平面ABCD,H为DC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/c2b731a9-a897-4b27-9b85-c2f27ed34d8d.png?resizew=196)
(1)求证:平面
平面POC;
(2)求三棱锥
体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c7b5614175be552338d8421c528ee66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/c2b731a9-a897-4b27-9b85-c2f27ed34d8d.png?resizew=196)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c397f33718faf3bccf74f7405260452e.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82524b9ff52ee0812a5c7c7fe880a97b.png)
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