名校
1 . 如图,在四边形
中(如图1),
,
=
分别是边
上的点,将
沿
翻折,将
沿
翻折,使得点
与点
重合(记为点
),且平面
平面
(如图2)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/1ccde777-bef6-4ca6-8be5-8b1749599f33.png?resizew=293)
(1)求证:
;
(2)求二面角
余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60663fe74a7d36de97b28a37a68e5812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d2431ed9c0e3c333b77882b76f9cc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532b3981b59bbc3bd1a3fe16f92a3027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0436efefa53aad714565ab2ba7ff90fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f81641a4693e44c4194875790bcccb58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666e154cbea71fa13440a81dbfa002c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/012bd742142c39a1c1de8830e778bb70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/1ccde777-bef6-4ca6-8be5-8b1749599f33.png?resizew=293)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288142497e082cae14f8f145243da9f3.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3afb434b4ab457497962d27dd015d094.png)
您最近一年使用:0次
2 . 如图所示,
平面ABC,
平面ABC,
,
,
,F为BC的中点.
(1)求证:
平面BDE;
(2)求凸多面体ABCED的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b190c8d3d7d7d0e6e959e8a52eae90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5359ad5437bb4605bea0dc58da9b94b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/32ae021c-b747-4a26-8d18-363ea0c5fa31.png?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcafa398cc6b6079883e7ad153eb62d.png)
(2)求凸多面体ABCED的体积.
您最近一年使用:0次
2023-10-13更新
|
348次组卷
|
2卷引用:黑龙江省哈尔滨市第九中学校2023-2024学年高三上学期10月月考数学试题
3 . 正四棱锥
中,
,
,过点
作截面分别交棱
于点
,且
,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/2cef9a4a-d41d-4044-b760-954639d36fc6.png?resizew=165)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a4426db778693c875e2dca9220875d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7358752f7e3a663f28e61e933ca202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/556e130c32c1eb22eaac0ca50cf09286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a24ee04b7e461c045431ce83d15a91de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/2cef9a4a-d41d-4044-b760-954639d36fc6.png?resizew=165)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
名校
解题方法
4 . 如图,在四棱锥
中,平面
平面
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/9b977376-b5e6-4624-bfe9-9d20fa138e76.png?resizew=165)
(1)求证:
;
(2)若点
为棱
上不与端点重合的动点,且
与平面
所成角正弦值为
,求
点到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37133487bdd8c12e0ef17317019cbae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aa6fd52f3933cbded9ce8c880b4a10.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/25/9b977376-b5e6-4624-bfe9-9d20fa138e76.png?resizew=165)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da48240e7fc3248f773ac1500c15ec14.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2023-04-23更新
|
1102次组卷
|
4卷引用:黑龙江省哈尔滨市第三中学校2023届高三三模数学试题
名校
解题方法
5 . 在四棱锥
中,平面
平面
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/bbfb4a14-0dd6-44b1-8ba8-90c79e2da136.png?resizew=173)
(1)求证:
;
(2)若
,
,
,
,点
在棱
上,直线
与平面
所成角为
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/21/bbfb4a14-0dd6-44b1-8ba8-90c79e2da136.png?resizew=173)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f2a2c03829634cec6d4d431159c6f27.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/964ec1dfd7e9d7f1a05c3e695f836a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a16964be330fb6a3b668c93c3e66b3fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c8ae071199874d9d74a4919a58902f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2023-04-17更新
|
2336次组卷
|
6卷引用:黑龙江省哈尔滨市第一中学校2023-2024学年高二上学期期中数学试题
黑龙江省哈尔滨市第一中学校2023-2024学年高二上学期期中数学试题广东省茂名市2023届高三二模数学试题(已下线)专题04 空间向量与立体几何(已下线)押新高考第20题 立体几何专题16空间向量与立体几何(解答题)山东省淄博实验中学2023届高三第三次模拟考试数学试题
名校
6 . 如图,在三棱柱
中,
是边长为2的等边三角形,
,平面
平面ABC.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/559f3292-9480-4bf7-b09b-2c7da36aba40.png?resizew=218)
(1)证明:
;
(2)若E为
的中点,直线
与平面
所成的角为45°,求直线
与平面
所成的角的正弦值.
![](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/252143a7b900d33862f60b2536f6a8ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/559f3292-9480-4bf7-b09b-2c7da36aba40.png?resizew=218)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/696da912e610974f0f437876b3d34ee3.png)
(2)若E为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bcb3226e013650b7d8827c31dd41d0.png)
您最近一年使用:0次
2023-04-16更新
|
1670次组卷
|
5卷引用:黑龙江省哈尔滨市第四中学校2023届高三下学期最后一模考试数学试题
名校
解题方法
7 . 如图,三棱锥
中.平面
平面
,过点
且与
平行的平面
分别与棱
交于
为线段
上的动点,若
,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/7/cae14593-a0d2-471d-b4d9-4f3d8c0bce1e.png?resizew=157)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78307cd417504554a4e2276fe24d1162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1489617eb560aca3bc8234be68617b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01b3a2610db11428d021e4bfe68e76c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5835650a0b28f682c048b1ed608fd696.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/7/cae14593-a0d2-471d-b4d9-4f3d8c0bce1e.png?resizew=157)
A.![]() |
B.若![]() ![]() ![]() ![]() |
C.线段![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-04-07更新
|
733次组卷
|
3卷引用:黑龙江省哈尔滨市第六中学校2023届高三一模数学试题
8 . 如图,在三棱柱
中,D,E,G分别为
的中点,
与平面
交于点F,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/259546a6-caeb-477d-b6ba-2240fb6a4aad.png?resizew=171)
(1)求证:F为
的中点;
(2)再从条件①、条件②这两个条件中选择一个作为已知,求直线FG与平面BCD所成角的正弦值.
条件①:平面
平面
;
条件②:
.
注:如果选择条件①和条件②分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd510bb1fac60cd11462e53d8c83bd50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79401a7ac26d20a9f8f739eb08207cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1efa2b0018617bd579875185dafca39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9d5815dc775d5a5810fff0b016a8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee293a0793db9093c40e42ecc6a2f88.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/259546a6-caeb-477d-b6ba-2240fb6a4aad.png?resizew=171)
(1)求证:F为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
(2)再从条件①、条件②这两个条件中选择一个作为已知,求直线FG与平面BCD所成角的正弦值.
条件①:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79401a7ac26d20a9f8f739eb08207cb3.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80dda3b696dafebd3d28066e56aa58d1.png)
注:如果选择条件①和条件②分别解答,按第一个解答计分.
您最近一年使用:0次
2023-03-09更新
|
1385次组卷
|
5卷引用:黑龙江省哈尔滨市第三中学校2023届高三第四次高考模拟考试数学试卷
名校
9 . 如图,在四棱锥
中,底面ABCD为正方形,
,平面
平面
,N是CD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/9988b1dd-fff3-4a53-aeed-97cf11902b61.png?resizew=160)
(1)若点M为线段PD上一点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
平面AMN,求
的值;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fcc62f1c0536d8f82409e8c8df7beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/9988b1dd-fff3-4a53-aeed-97cf11902b61.png?resizew=160)
(1)若点M为线段PD上一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced22fbe85d4a749c7b0b6bbae3ea3e7.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a4bddf1ea3c5d37f2233a4821909e9.png)
您最近一年使用:0次
名校
解题方法
10 . 如图,三棱锥S-ABC中,平面
平面ABC,过点B且与AC平行的平面
分别与棱SA、SC交于E,F,若
,
,则下列结论正确的为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/53e83e12-06d9-49f6-9db7-2b3e994ce73d.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78307cd417504554a4e2276fe24d1162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ec0603f31cafdd78558d442642126a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9538281f10aa8129a3d0cc49a0370db5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/30/53e83e12-06d9-49f6-9db7-2b3e994ce73d.png?resizew=175)
A.三棱锥S-ABC中的外接球表面积为![]() |
B.![]() |
C.若E,F分别为SA,SC的中点,则BF与SA所成角的余弦值为![]() |
D.![]() |
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