名校
1 . 如图,平行六面体
中,
分别为
的中点,
在
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/94616061-bf76-46ab-99da-9b735c5ae156.png?resizew=188)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
;
(2)若
平面
,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ae536809b1161fd4e83fdc7f42be96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/548d64146122e344b7d30bf0dbedb374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/21/94616061-bf76-46ab-99da-9b735c5ae156.png?resizew=188)
(1)求证:
![](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/4ba9e20d667d04bf3ee7f55cc795ce01.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bdae41b55a363ec99d18d80a431d1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481dfd21e76d5039750bda168fc76ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecf35bb2453db07d66391f501fa7a1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b54387f870ae37f7951b253665d64f6.png)
您最近一年使用:0次
2024-03-29更新
|
1198次组卷
|
2卷引用:吉林省通化市梅河口市第五中学2024届高三下学期一模数学试题
名校
2 . 如图所示,在四棱锥
中,平面
平面ABCD,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/c2791350-7d31-487e-a046-f3dbb9ab78e7.png?resizew=173)
(1)若点
是棱AP上一点,且
平面PCD,求
;
(2)若
,
,平面PCD与平面PAB交于直线
,求直线
与平面PAD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe9d26aa29b3abf4889d939987d5f091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10fc85ea4dbbef4bee9530345536927.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/c2791350-7d31-487e-a046-f3dbb9ab78e7.png?resizew=173)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f369bec2d5682bf6b8b317a08aff546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f32f82942e12701f6ba4b87d02291b1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec467f990b9e1f8d56f7e17df1019a5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2899e607479d8d1c47d954ae9ebb7144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
名校
3 . 如图,在四棱锥P-ABCD中,底面ABCD是梯形,
,AD⊥CD,CD=2AB=4,△PAD是正三角形,E是棱PC的中点.
平面PAD;
(2)若
,平面PAD⊥平面ABCD,求直线AB与平面PBC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4746df85049d1651d3f6c30212a7a9.png)
您最近一年使用:0次
2023-03-03更新
|
2197次组卷
|
3卷引用:吉林省通化市梅河口市第五中学2024届高三下学期二模数学试题
名校
4 . 已知三棱柱
,侧面
是边长为2的菱形,
,侧面四边形
是矩形,且平面
平面
,点D是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/0b46c545-ce4a-4491-b87e-94c260ad6b66.png?resizew=135)
(1)在棱AC上是否存在一点E,使得
平面
,并说明理由;
(2)当三棱锥
的体积为
时,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa89eb1a4368b0aacff77a1eae81240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/0b46c545-ce4a-4491-b87e-94c260ad6b66.png?resizew=135)
(1)在棱AC上是否存在一点E,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6a3413b77478c8d4e1e0389dbf5984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd823da794135c17889c2a2d42d0a149.png)
(2)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a555d0f53b1a2e8c56c2eb63f2fe463b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a52848aff08399a36f217356007a4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0186d11008c7d66c85ed0d8d2e568908.png)
您最近一年使用:0次
2022-11-15更新
|
1341次组卷
|
9卷引用:吉林省通化梅河口市第五中学2022-2023学年高三上学期期末考试数学试题
名校
5 . 如图,正方体
中,顶点
在平面
内,其余顶点在
的同侧,顶点
到
的距离分别为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27a7de1da57f61e551e275024bfc80f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680e9ef551b325387ab31dca1f893705.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/22/1d5ba15b-b11d-4eb2-9979-53c9c9e673ff.png?resizew=155)
A.![]() ![]() ![]() |
B.平面![]() ![]() |
C.直线![]() ![]() ![]() ![]() |
D.正方体的棱长为![]() |
您最近一年使用:0次
2022-06-25更新
|
717次组卷
|
4卷引用:吉林省通化市梅河口市第五中学2024届高三上学期12月月考数学试题
名校
解题方法
6 . 如图,在三棱柱
中,底面
为直角三角形,
,侧棱
底面
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d289a52b00154f78031af90afa02135.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/23eb0505-5802-4081-ab92-0e3ee2e4613a.png?resizew=146)
(1)证明:平面
平面
;
(2)若点
为侧棱
的中点,点
为棱
上的一点,且
,证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d289a52b00154f78031af90afa02135.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/23eb0505-5802-4081-ab92-0e3ee2e4613a.png?resizew=146)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21dee56b9f36ba8f76fe67b76383636b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccb83d132af8310c48b0c9e84e0bcb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896e293411e2fd0da215ff20781cb36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bff3ccea5989c60e51e321af3f53f54.png)
您最近一年使用:0次
2020-10-29更新
|
906次组卷
|
3卷引用:吉林省梅河口市第五中学2020-2021学年高三上学期第三次月考数学(理)试题
名校
7 . 如图,在正四棱柱
中,
,
,
,
,
是棱
的中点,平面
与直线
相交于点
.
![](https://img.xkw.com/dksih/QBM/2020/8/13/2527151783485440/2529352429920256/STEM/747944ba-c1b1-4ad0-8ef3-f72d0dfbc045.png)
(1)证明:直线
平面
.
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f9cd84175a25f3206a19a2cdba6ef97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93dab41e3f7e907cc9a890eb3171c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2020/8/13/2527151783485440/2529352429920256/STEM/747944ba-c1b1-4ad0-8ef3-f72d0dfbc045.png)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d89992744fb42d976f786bbd7e562770.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89c9c2c831a0552a7c934365bc49ad3f.png)
您最近一年使用:0次
2020-08-17更新
|
502次组卷
|
9卷引用:吉林省梅河口市第五中学2020届高三第五次模拟考试数学(理)试题
吉林省梅河口市第五中学2020届高三第五次模拟考试数学(理)试题辽宁省抚顺市六校(省重点)联合体2020届高三5月联考数学(理科)试题2020届广东省湛江市高三二模数学(理)试题青海省海东市2020届高三第四次模拟考试数学(理)试题辽宁省辽南协作校2020届高三(5月份)高考数学(理科)模拟试题(已下线)专题20 立体几何综合-2020年高考数学(理)母题题源解密(全国Ⅱ专版)(已下线)专题04 空间角——2020年高考数学母题题源解密(山东、海南专版)青海省海东市2019-2020学年高二下学期期末联考数学(理)试题辽宁省大连市第十五中学2021-2022学年高二上学期期中数学试题
名校
解题方法
8 . 如图,在四棱锥
中,底面
的对角线互相垂直,且
,
,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/8c062b06-98ac-43c5-8ba8-1c379a42bf72.png?resizew=133)
(1)若
为
的中点,求证:
平面
;
(2)若
,
,点
在
上,且
,求点
到平面
的距离.
![](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/5a16dc02090b6e9263555061f14fbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/8c062b06-98ac-43c5-8ba8-1c379a42bf72.png?resizew=133)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cac1ef789b01848985e1b08759f7ee9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d626d50739ab7df7bf16379cbff81b.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/a3261581eb9171dadfc3130d89c3e545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af29254fe60a392c249c5791279e9c8.png)
您最近一年使用:0次
2020-07-22更新
|
299次组卷
|
2卷引用:吉林省梅河口市第五中学2020届高三第七次模拟考试数学(文)试题
名校
解题方法
9 . 某产品的包装纸可类比如图所示的平面图形,其可看作是由正方形
和等腰梯形
拼成,已知
,
,在包装的过程中,沿着
将正方形
折起,直至
,得到多面体
,
分别为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/b35bc6e1-5319-492e-844a-a1e834d6f0cd.png?resizew=286)
(1)证明:
平面
;
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc6fd59aca9984b6e13354749339823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66a388e2ef14c62b3c4f5e49e71ea3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc6fd59aca9984b6e13354749339823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6e8ba43e369aba34dacbf1ee040556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d0dbca4c6e895ac7dfa04f47eaa78e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd24b8b3ad430ba67f8e79512b44f703.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/b35bc6e1-5319-492e-844a-a1e834d6f0cd.png?resizew=286)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc6fd59aca9984b6e13354749339823.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71ea64c4783b36659e62bb8cbf07eb7.png)
您最近一年使用:0次
名校
10 . 如图在四棱锥
中底面
为直角梯形,
,
,侧面
为正三角形且平面
底面
,
,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/2020/4/27/2450751034671104/2451967921094656/STEM/6351e631f23a4c8995a415bcb43531d7.png?resizew=227)
(1)证明:
平面
;
(2)求
与平面
所成角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be0f0efd8a192226dd8880eb07446dba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9723a6e093c297b001436e8932b1820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9c9cfa597b444b5c9dbae7a825a695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448cbac9a1ef3de7538a6b30cdc39582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78aafccd397e9c88a567abf4993d40f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abb5b97a2b93cb9c3d3956bef6ae6ab.png)
![](https://img.xkw.com/dksih/QBM/2020/4/27/2450751034671104/2451967921094656/STEM/6351e631f23a4c8995a415bcb43531d7.png?resizew=227)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/871221c3eaabb6d9b030ce91c7139709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9c9cfa597b444b5c9dbae7a825a695.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7495688c046142f688c822209c0e968e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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