1 . 已知
是半径为6的球
表面上的三个点,且
,则三棱锥
的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba919d5c415b91dbf2c78142ab01714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
2 . 如图1,有一个边长为4的正六边形
,将四边形
沿着
翻折到四边形
的位置,连接
,形成的多面体
如图2所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/7978d595-7323-4501-89ed-31b864863542.png?resizew=440)
(1)证明:
.
(2)设二面角
的大小为
,
是线段
上的一个动点(
与
不重合),四棱锥
与四棱锥
的体积之和为
,试写出
关于
的函数表达式,并探究
为何值时,
有最大值,求出最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666e9462f20d4004c666654842817476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f9225e06a746264c5d5f79af36dff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e5016c9137ae6cac7d5b83cea41771.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/7978d595-7323-4501-89ed-31b864863542.png?resizew=440)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193a0c7b4ccb16374d990209aa1fe9fc.png)
(2)设二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4fe93e4b469e817260ccc5ea12ba5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a515001be2cf972fce18a68bdb552609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4117625867a74cd022584500c76deca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0d3f5c410ccce080ef25e33b11c9d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
您最近一年使用:0次
2022-09-24更新
|
437次组卷
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3卷引用:福建师范大学附属中学2021-2022学年高一下学期期末考试数学试题
名校
解题方法
3 . 过
所在平面
外一点P,作
,垂足为
,.以下推断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59169f91ebc758ba6e73fc99fcfaab15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
A.若![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.过点![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2022-09-24更新
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701次组卷
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3卷引用:福建师范大学附属中学2021-2022学年高一下学期期末考试数学试题
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解题方法
4 . 三棱柱
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/f6a75da9-404e-414a-a7e3-1da3bbd50cd2.png?resizew=236)
(1)证明:
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cb2f5477932ca99ec26d259a6f3466d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/f6a75da9-404e-414a-a7e3-1da3bbd50cd2.png?resizew=236)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae15e5357601ddb7e303b56dbe337145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20b124475cdfe9a082a8f9f34af9193.png)
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2022-09-22更新
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6卷引用:福建省泉州市2023-2024学年高二上学期期末适应性练习数学试题
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解题方法
5 . 已知矩形ABCD中,
,将
沿BD折起至
,当
与AD所成角最大时,三棱锥
的体积等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9639896487e6cf18e8fd02d2a7ed2087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73636989e83905f8800a865c2b608c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c430e9f8f14a4753fc8e1da8aeca22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8f20e3745b76031e0bf6f5a4a860165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81b32ae75c9beabff560f1b52a52d434.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-09-22更新
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6卷引用:福建省福州第十一中学2023届高三上学期期末线上适应性训练数学试题
福建省福州第十一中学2023届高三上学期期末线上适应性训练数学试题福建省泉州市2023届高三毕业班质量监测(一)数学试题福建省泉州市2022-2023学年高三上学期期初数学试题(已下线)第03讲 直线、平面平行垂直的判定与性质(练)(已下线)专题15 立体几何(讲义)-1江西省宜春市上高二中2022-2023学年高二上学期第一次月考数学试题
名校
6 . 如图,已知正方体
的棱长为2,点
,
在平面
内,若
,
,则下述结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/110d2210-4f0e-4441-8620-047983e77323.png?resizew=192)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/600c2b2a205cc72c31bdda134bc60501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5621c78ba894e47b6161e27a664093a0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/110d2210-4f0e-4441-8620-047983e77323.png?resizew=192)
A.![]() ![]() ![]() | B.点![]() |
C.![]() ![]() | D.直线![]() ![]() ![]() |
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2022-09-13更新
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8卷引用:福建省福州市四校联盟2021-2022学年高二上学期期末联考数学试题
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7 . 如图,已知平行六面体
的各棱长相等,则“
”是“
⊥平面
”的( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/2e534d23-b4d7-41de-b9b5-a2ba11ddd710.png?resizew=146)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94689d2a579ffd226d7327ff7802fa8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabe764f05300ac83c7d16b685d27af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73845d4d663b3de0b281611fe2c762fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/2e534d23-b4d7-41de-b9b5-a2ba11ddd710.png?resizew=146)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
2022-09-10更新
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300次组卷
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3卷引用:福建省泉州科技中学2021-2022学年高二下学期期末数学试题
8 . 如图,在四棱锥
中,底面
是平行四边形,
,侧面
底面
分别为
的中点,点
在线段
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/10/1feff761-8407-47ed-8258-47a9c29ce8dc.png?resizew=190)
(1)求证:
平面
;
(2)如果直线
与平面
所成的角和直线
与平面
所成的角相等,求
的值.
![](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/ede26321a9ce345b56bae5a6dbbb588e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cb7e57ecc88f6aaa6472471b0bea9cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46c696ff5f123a482bae81cf9a1b570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/10/1feff761-8407-47ed-8258-47a9c29ce8dc.png?resizew=190)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)如果直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47548785e478bc5b9591341a881e3127.png)
您最近一年使用:0次
2022-09-10更新
|
464次组卷
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2卷引用:福建省泉州市惠安一中、养正中学、安溪一中、养正中学、泉州实验中学2020-2021学年高二下学期期末联考数学试题
名校
解题方法
9 . 如图,在三棱柱
中,四边形
是边长为4的正方形﹒请从条件①、②、③中选择两个能解决下面问题的作为已知,并作答.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/f3398ac8-98b7-446b-b9a2-b863d99f1068.png?resizew=205)
条件①:
;条件②:
;条件③:平面
平面
﹒
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值﹒
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/f3398ac8-98b7-446b-b9a2-b863d99f1068.png?resizew=205)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02273296ef80813f45933d31a833f160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4fcf607b0710d12aaabd17fd053d83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
您最近一年使用:0次
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10 . 如图,在四棱锥P-ABCD中,底面ABCD为矩形,△PAD是边长为2的正三角形,平面PAD⊥平面ABCD,E为棱PD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/21cf22b1-c708-4d0d-a1b7-2324efde1c62.png?resizew=174)
(1)求证:AE⊥平面PCD;
(2)若直线PC与平面ABCD所成角的正切值为
,求侧面PAD与侧面PBC所成二面角的大小.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/21cf22b1-c708-4d0d-a1b7-2324efde1c62.png?resizew=174)
(1)求证:AE⊥平面PCD;
(2)若直线PC与平面ABCD所成角的正切值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
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2022-07-17更新
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811次组卷
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9卷引用:福建省莆田市2021-2022学年高一下学期期末数学试题
福建省莆田市2021-2022学年高一下学期期末数学试题 福建省福州第二中学2022-2023学年高一下学期第四学段(期末)考试数学试题(已下线)模块二 专题3《立体几何初步》单元检测篇 B提升卷(已下线)模块二 专题5《立体几何初步》单元检测篇 B提升卷(人教B)(已下线)模块二 专题5《立体几何初步》单元检测篇 B提升卷(北师大版)云南省宣威市第三中学2022-2023学年高二下学期第三次月考数学试题(已下线)模块三 专题8(立体几何初步)拔高能力练(北师大版)(已下线)模块三 专题7 大题分类练(立体几何初步)拔高能力练(人教A)(已下线)模块三 专题8大题分类练(立体几何初步)拔高能力练(苏教版)