1 . 如图,点
在正方体
的面对角线
上运动,则下列四个结论,其中正确的结论的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/13/c34ef381-6a86-4f5f-9720-504854b3f9a5.png?resizew=156)
A.三棱锥![]() |
B.![]() ![]() |
C.![]() |
D.平面![]() ![]() |
您最近一年使用:0次
2022-08-26更新
|
1434次组卷
|
17卷引用:重庆市永川北山中学校2022届高三高考冲刺5数学试题
重庆市永川北山中学校2022届高三高考冲刺5数学试题江苏省苏州市工业园区星海高中2019-2020学年高一下学期期中数学试题(已下线)【新东方】在线数学170高一下广东省肇庆市第一中学2020-2021学年高一下学期期中数学试题江苏省苏州市吴江汾湖高级中学2020-2021学年高一下学期5月阶段性检测数学试题河北省石家庄市第一中学东校区2020-2021学年高二下学期教学质量检测(一)数学试题广东省广州市秀全中学2021-2022学年高一下学期期中数学试题吉林省延边朝鲜族自治州延边第一中学2021-2022学年高一下学期期中数学试题湖北省宜昌英杰学校2022-2023学年高二上学期9月起点考试数学试题福建省泉州市第七中学2022-2023学年高二上学期9月测试数学试题辽宁省沈阳市小三校2022-2023学年高三上学期10月月考数学试题浙江省金华市东阳市外国语学校2022-2023学年高一下学期5月月考数学试题山东省淄博市淄博第一中学2022-2023学年高二上学期10月月考数学试题陕西省铜川市宜君县高级中学2022-2023学年高一下学期期中数学试题河南省南阳市第一中学校2023-2024学年高二上学期假期质量评估数学试题(已下线)期中模拟预测卷03(测试范围:必修二前三章)-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)(已下线)FHsx1225yl194
名校
2 . 如图,已知三棱柱
的底面是正三角形,且
平面
,
是
的中点,且
.
(1)求证:
平面
;
(2)已知三棱锥
的体积为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/181b4947-0e1c-49f1-92ce-93e634f321a7.png?resizew=262)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd597851c0db4e4de4769e10e09383b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f233b375753611ffa7a93c2c12ef5e28.png)
(2)已知三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52b8e3a9b0152670bdad823efd3727bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a8b76e36783a69d14ec54af82c7df0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be537626f0f027cb94e2d155f49ebcdf.png)
您最近一年使用:0次
2020-10-16更新
|
597次组卷
|
2卷引用:重庆市巴蜀中学2021届高三上学期适应性月考(二)数学试题
解题方法
3 . 如图所示,在矩形
中,
,E为边
的中点,将
沿直线
翻折为
,若F为线段
的中点.在
翻折过程中,
![](https://img.xkw.com/dksih/QBM/2020/8/12/2526438981509120/2528992077488128/STEM/c5c7354e-342d-4862-af8d-c2cb5e67d172.png?resizew=226)
(Ⅰ)求证:
面
;
(Ⅱ)求多面体
体积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526908dfb46cf151b8ab1492a9d52047.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/8a49088d8f4cae827c70a903191f7a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17288da70b31823293794cb289e3123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/2020/8/12/2526438981509120/2528992077488128/STEM/c5c7354e-342d-4862-af8d-c2cb5e67d172.png?resizew=226)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec5df468bd3a6550726fe28c570d944d.png)
(Ⅱ)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
您最近一年使用:0次
4 . 如图,在正三棱柱ABC﹣A1B1C1中,D为AB的中点,E为棱BB1上一点,且
.
(1)在下列两个问题中任选一个作答,如果两个都作答,则按第一个解答计分.
①证明:AE⊥平面A1CD;
②证明:BC1∥平面A1CD.
(2)若AB=2,AA1=3,求二面角A1﹣BC1﹣C的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad77d896c9ac008a6832f10079ec2e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/9ac00619-ba16-468b-aade-cd30129d0194.png?resizew=157)
(1)在下列两个问题中任选一个作答,如果两个都作答,则按第一个解答计分.
①证明:AE⊥平面A1CD;
②证明:BC1∥平面A1CD.
(2)若AB=2,AA1=3,求二面角A1﹣BC1﹣C的余弦值.
您最近一年使用:0次
2020-07-23更新
|
464次组卷
|
3卷引用:重庆市渝西九校2020届高三(5月份)高考数学(理科)联考试题
解题方法
5 . 如图所示,菱形ABCD与正△BCE所在平面互相垂直,FD⊥平面ABCD,且AB=2,FD=
.
![](https://img.xkw.com/dksih/QBM/2020/7/22/2511601600110592/2512027327438848/STEM/22a38ee2-2549-4a34-bc1c-b115fc5397d5.png)
(Ⅰ)求证:EF∥平面ABCD;
(Ⅱ)若BD=2
,求几何体EFABCD的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2020/7/22/2511601600110592/2512027327438848/STEM/22a38ee2-2549-4a34-bc1c-b115fc5397d5.png)
(Ⅰ)求证:EF∥平面ABCD;
(Ⅱ)若BD=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
您最近一年使用:0次
名校
6 . 如图,四棱锥
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/7/21/2510918789816320/2511641167937536/STEM/17c30233733e42409815df83c254823e.png?resizew=243)
(1)求证:
平面
;
(2)若
,
且
,平面
平面
,
,求直线
与平面
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ba0fee1e22a8b08874e58083fff31cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3643175b4e5ea91235a276a9ba9291c.png)
![](https://img.xkw.com/dksih/QBM/2020/7/21/2510918789816320/2511641167937536/STEM/17c30233733e42409815df83c254823e.png?resizew=243)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0684e0b09b04661c602437982c0397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3c74b930d4e691b519965e436f2c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c8a72acdef14452a6c62f2a60a15fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2020-07-22更新
|
219次组卷
|
3卷引用:河南省大联考2020届高三阶段性测试(七)理科数学试题
7 . 在三棱柱
中,已知侧棱与底面垂直,∠CAB=90°,且AC=1,AB=2,E为BB1的中点,M为AC上一点,AM=
AC.
![](https://img.xkw.com/dksih/QBM/2021/1/6/2630467917291520/2631943177740288/STEM/39b280e34f5f40cd8875e72c0bfe6e1c.png?resizew=150)
(1)若三棱锥
的体积为
,求
的长;
(2)证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://img.xkw.com/dksih/QBM/2021/1/6/2630467917291520/2631943177740288/STEM/39b280e34f5f40cd8875e72c0bfe6e1c.png?resizew=150)
(1)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5ac82002adf03463f753b9833e6579.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0467b0675c3ecfb282cc88255284d3e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53eec6b6fbd4e275f92828298a4bcfb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0685857389c8f5e388eed590b9b787ba.png)
您最近一年使用:0次
2021-01-08更新
|
791次组卷
|
10卷引用:【全国百强校】重庆巴蜀中学2019届上学期高三期中复习文科数学试卷
【全国百强校】重庆巴蜀中学2019届上学期高三期中复习文科数学试卷【全国省级联考】黑龙江省2018届高三普通高等学校招生全国统一考试 仿真模拟(五)数学试题(理科)【全国省级联考】黑龙江省2018年 普通高等学校招生全国统一考试 仿真模拟(五)数学(文科)试卷四川省华蓥市第一中学2019届高三入学调研考试文科数学(一)试题【全国百强校】四川省成都市棠湖中学2019届高三二诊模拟数学(文)试题【全国百强校】四川省棠湖中学2019届高三上学期第三次月考数学(文)试题2020届四川省泸县第二中学高三下学期第一次在线月考数学(理)试题2020届四川省泸县第二中学高三下学期第一次在线月考数学(文)试题(已下线)专题8.4 直线、平面平行的判定及性质 (精练)-2021年高考数学(文)一轮复习学与练(已下线)8.4 空间直线、平面的平行--2020--2021高中数学新教材配套提升训练(人教A版必修第二册)
8 . 在多面体
中,点
是矩形
的对角线的交点,三角形
是等边三角形,棱
且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/2c236b96-b009-4e0e-8dac-e139bb31a3ff.png?resizew=147)
(Ⅰ)证明:
平面
;
(Ⅱ)设
,
,
,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.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/10fc7991ea17d54ff5f4445ac5699463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d459cad63e3cd2aba10862800fa4832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a4c9a32fe02c162f0521a0a01be263e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/2c236b96-b009-4e0e-8dac-e139bb31a3ff.png?resizew=147)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2af7558ef7f1c410a86b0c42f049587.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc2817fa590affb5a760a25dc65308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac34dad8dd3d94f1a30f15e83624975c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
9 . 如图,在棱长为2的正方体
中,E,F,G,H分别是棱![](https://staticzujuan.xkw.com/quesimg/Upload/formula/282889d3d1f66777fd433a6ea1229b19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff506ec404de582145f1d4c1c65e65dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5281b75b75cea406846992aa68f5ad75.png)
的中点,直线AF与DH交于点P,直线BE与CG交于点S.
![](https://img.xkw.com/dksih/QBM/2020/2/5/2392689532329984/2394086485065728/STEM/e4555aa5a14c40e3a8b41c251b82fca2.png?resizew=143)
(1)求证:直线
平面ABCD;
(2)求四棱锥B-PDCS的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/282889d3d1f66777fd433a6ea1229b19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff506ec404de582145f1d4c1c65e65dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5281b75b75cea406846992aa68f5ad75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://img.xkw.com/dksih/QBM/2020/2/5/2392689532329984/2394086485065728/STEM/e4555aa5a14c40e3a8b41c251b82fca2.png?resizew=143)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1ac9a85c1ec644051964516d40f96b.png)
(2)求四棱锥B-PDCS的体积.
您最近一年使用:0次
2020-02-07更新
|
567次组卷
|
3卷引用:2020届重庆市高三上学期期末测试卷文科数学( 一诊康德卷)
2020届重庆市高三上学期期末测试卷文科数学( 一诊康德卷)陕西省西安市高新一中2019-2020学年高三上学期期末文科数学试题(已下线)专题34 立体几何解答题中的体积求解策略-学会解题之高三数学万能解题模板【2022版】
名校
解题方法
10 . 如图,在平行四边形
中,
,
,
,
分别是
和
的中点,将
沿着
向上翻折到
的位置,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/eed84f19-b7ad-472f-a012-40fb19fc6eef.png?resizew=334)
(1)求证:
平面
;
(2)若翻折后,四棱锥
的体积
,求
的面积
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b96fac11d72f72c805dbddb8da72d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3814287dbb60d478bffc5366f9928b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32a07205a2580b2b9f5ca3c3e0920cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/eed84f19-b7ad-472f-a012-40fb19fc6eef.png?resizew=334)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
(2)若翻折后,四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72dfcc26700f0801e8113e1caeb4a6eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b345b3acb3453fa84d956718aa5847a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3949cce1b099918ac010dee873c409ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次
2020-02-16更新
|
383次组卷
|
2卷引用:2019届重庆市南开中学高考冲刺二(文)数学试题