名校
1 . 如图所示,在多面体
中,底面
为直角梯形,
,
,侧面
为菱形,平面
平面
,M为棱
的中点.
(1)若点N为
的中点,求证:
平面
;
(2)若
,
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/12/c87dbbfb-f024-4c65-8c25-55b9a2481c20.png?resizew=150)
(1)若点N为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cbc74aa0d6c8ff230e586227f2eed9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78aafccd397e9c88a567abf4993d40f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c1f6300d38aa95f318f59a9f38d01b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2246c0e92e8cc344f636ea8f8f9037e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebce46aeb97373353179e5669365fa4a.png)
您最近一年使用:0次
2 . 在正方体
中,
为底面
的中心,
为线段
上的动点(不与两个端点重合),
为线段
的中点,则以下正确的是____________ .
①直线
与
是异面直线;
②三棱锥
的体积是定值;
③存在点
,使
平面
;
④存在点
,使
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
①直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75cf21d5511e147e34f63e6364e6bb4f.png)
③存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02cb62f4c1e0e023619922eb8a509c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
④存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1d2e0f281222a5f289ea4008370aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
您最近一年使用:0次
2023-05-26更新
|
451次组卷
|
3卷引用:广西南宁市第二中学2023届高三高考考前模拟大演练数学(文)试题
名校
解题方法
3 . 如图,在四棱锥
中,四边形
是等腰梯形,
.点
为棱
的中点,点
为棱
上的一点,且
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/7/f97d15b3-4c23-4075-aa00-db939dc76256.png?resizew=196)
(1)证明:
平面
;
(2)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8fb8fe0ab08410e6976f53bbc3115a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34fede59cd1e8b8a467fac144321efd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/7/f97d15b3-4c23-4075-aa00-db939dc76256.png?resizew=196)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
2023-05-07更新
|
583次组卷
|
2卷引用:广西柳州高级中学、南宁市第二中学2023届高三联考数学(文)试题
名校
解题方法
4 . 如图,在四棱锥
中,
是边长为1的正三角形,平面
平面
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/de1b8752-f357-4381-9c25-9a1175d421d3.png?resizew=166)
(1)求证:
平面
;
(2)求
到平面
的距离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29ed30f17b5944e4afc66ab1d5f7394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9ab73fd4ddacc0c1524f8d742c7dcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d74bc0e4660fd4670077fc7690a7252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e056089ae36a2892cdc776c89d649294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206890afe387969cbbc45cfc639fcbe6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/de1b8752-f357-4381-9c25-9a1175d421d3.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002cc6a0373255f39172cdee62fb6b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2023-04-20更新
|
628次组卷
|
3卷引用:广西南宁市2023届高三二模数学(文)试题
5 . 如图,在四棱锥
中,
是边长为1的正三角形,面
面
,
,
,
,C为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/23/65dd729f-51ec-4fa3-b0b0-fb7bafbb16ec.png?resizew=164)
(1)求证:
平面
;
(2)线段
上是否存在点F,使二面角
的余弦值为
,若存在,求
.若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29ed30f17b5944e4afc66ab1d5f7394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9ab73fd4ddacc0c1524f8d742c7dcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec853fb315a3c7ce3699bc4ca0d74f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e056089ae36a2892cdc776c89d649294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206890afe387969cbbc45cfc639fcbe6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/23/65dd729f-51ec-4fa3-b0b0-fb7bafbb16ec.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f8b463fcecf0a757f386db56e074d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b09bf736f994785cbf62be5ac1b111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1533d5d60816c28511bb4dadbd3c85a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
您最近一年使用:0次
名校
解题方法
6 . 已知四棱锥
中,底面ABCD为平行四边形,
底面ABCD,若
,
,E,F分别为
,
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/a7720b20-45ce-4f05-95dd-48d4c3c842cc.png?resizew=205)
(1)求证:
平面PBC;
(2)当
时,求平面PEF与平面PAD所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d6baf49925a5bcb359b542d45067c81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/a7720b20-45ce-4f05-95dd-48d4c3c842cc.png?resizew=205)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2951b9f77413d5f062acb300b09de1f6.png)
您最近一年使用:0次
2023-04-16更新
|
808次组卷
|
5卷引用:广西梧州市苍梧中学2023届高三5月份高考数学模拟试题
7 . 如图,在四棱锥
中,平面
平面ABCD,
,
,点E在棱BF上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/c14ee36e-3f43-49c8-b43e-4ab66c5df451.png?resizew=141)
(1)求三棱锥
的体积;
(2)判断直线AE与平面DCF是否相交,如果相交,在图中画出交点H(不需要说明理由),并求出线段AH的长;如果不相交,求直线AE到平面DCF的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5ba482836565abad208665cf7b9972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf84ed033bd035c2fe7552badd5e447d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e6ccd0fffd8d1df432d99f86f9f4678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b9fa6f4dab63cb9d63a3330a0aba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7acb013aba6d3165c7512bd8b9957040.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/c14ee36e-3f43-49c8-b43e-4ab66c5df451.png?resizew=141)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/488eb032fffcac002d2c1877cc27c6cf.png)
(2)判断直线AE与平面DCF是否相交,如果相交,在图中画出交点H(不需要说明理由),并求出线段AH的长;如果不相交,求直线AE到平面DCF的距离.
您最近一年使用:0次
2023-04-10更新
|
470次组卷
|
4卷引用:广西桂林市、崇左市2023届高三一模数学(文)试题
广西桂林市、崇左市2023届高三一模数学(文)试题广西壮族自治区防城港市2023届高三下学期4月第三次联合调研数学(文)试题(已下线)专题13立体几何(解答题)(已下线)广东省佛山市2024届高三教学质量检测(一)数学试题变式题17-22
解题方法
8 . 如图,在正方体
中,
分别为所在棱的中点,
为下底面的中心,则下列结论中错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/76fe4a07-5263-4e90-9c7b-ac815ad79970.png?resizew=190)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b094411c562930ff2d67b582cfd48cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/76fe4a07-5263-4e90-9c7b-ac815ad79970.png?resizew=190)
A.平面![]() ![]() | B.![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
2023-03-16更新
|
1173次组卷
|
7卷引用:广西玉林市北流市2023届高三年级教学质量检测数学(理)试题
名校
9 . 如图,在正方体
中,M,N分别为AC,
的中点,则下列说法中不正确 的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/968f37ee-3bdf-4494-9ad6-1e9c5722588d.png?resizew=176)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/968f37ee-3bdf-4494-9ad6-1e9c5722588d.png?resizew=176)
A.![]() ![]() |
B.![]() |
C.直线MN与平面ABCD所成的角为60° |
D.异面直线MN与![]() |
您最近一年使用:0次
2023-03-10更新
|
2206次组卷
|
10卷引用:广西桂林市国龙外国语学校2023届高三5月预测考试数学(理)试题
广西桂林市国龙外国语学校2023届高三5月预测考试数学(理)试题河南省2023届普通高中毕业班高考适应性考试文科数学试题(已下线)专题25 异面直线所成角-2陕西省西安中学2023届高三七模理科数学试题(已下线)专题09 立体几何初步四川省成都市天府新区太平中学2022-2023学年高二下学期3月月考数学(文科)试题四川省成都市天府新区太平中学2022-2023学年高二下学期3月月考数学(理科)试题四川省达州市外国语学校2022-2023学年高二下学期期中考试数学(文) 试题四川省达州市外国语学校2022-2023学年高二下学期期中考试数学(理)试题河南省郑州励德双语学校2023-2024学年高二上学期第一次月考数学试题
10 . 如图所示的多面体中,四边形
是矩形,
,△
,△
都是边长为2的正三角形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
(1)证明:
平面
;
(2)求这个多面体的体积
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2194add18a7df1a23cf1554dc2da1b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e51817ee1ebf17c73ed21171bcfc5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/24/a8d72539-23d3-4c76-a26b-7dc5849f27c0.png?resizew=195)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求这个多面体的体积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
您最近一年使用:0次