解题方法
1 . 如图,在斜三棱柱
中,
,且三棱锥
的体积为
.
(1)求三棱柱
的高;
(2)若平面
平面
为锐角,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131b887a0a088c760df5e17bd93bfe6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861d61d2b7b16e12fd97f870fb3fa522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/16/b7376265-a332-4131-9844-0dccb3b38662.png?resizew=168)
(1)求三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1111386161dc558c54930e35aa302737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32bbdf5dbf9df96742624ada95c36146.png)
您最近一年使用:0次
2024-02-24更新
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222次组卷
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4卷引用:河南省焦作市2023-2024学年高二上学期1月期末考试数学试题
2 . 如图,四棱锥的底面
是边长为
的菱形,
,
,
,平面
平面
,E,F分别为
,
的中点.
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.png)
您最近一年使用:0次
2023-11-07更新
|
620次组卷
|
5卷引用:河南省焦作市博爱县第一中学2023-2024学年高二上学期期中数学试题
解题方法
3 . 在如图所示的几何体中,四边形
为矩形,
平面
,
,且
.
(1)求证:
平面
;
(2)求证:平面
平面
;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b190c8d3d7d7d0e6e959e8a52eae90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22facbd7894b1dcaf6a985e99f33f025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128e149063710fd83f19896ba2998577.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/24/c91b27cb-84fb-4fba-b692-2b6a74f7f7e6.png?resizew=107)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df6a3413b77478c8d4e1e0389dbf5984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32fdd65aa55d1833750ef453a295d19.png)
您最近一年使用:0次
解题方法
4 . 如图1,在
中,
,
,
为
的中点,
为
上一点,且
.现将
沿
翻折到
,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/56b07a27-0183-46df-a3d7-1cff87c6bd18.png?resizew=392)
(1)证明:
.
(2)已知
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a566b100fb2ebe3d208f9b6527934218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9680bd6f250acb8b568510419b59d3e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9272e76d70b87882b81823e5de53bc14.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/56b07a27-0183-46df-a3d7-1cff87c6bd18.png?resizew=392)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8c5e0036173420e073f26c8f643ae3.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ee386d4744d2fbdb91a94da4027983.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba844d4d35a531a0abe98fbd33a4582.png)
您最近一年使用:0次
2023-03-14更新
|
698次组卷
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6卷引用:河南省焦作市2022-2023学年高三第二次模拟考试数学(文科)试题
河南省焦作市2022-2023学年高三第二次模拟考试数学(文科)试题贵州省黔东南州2023届高三第一次适应性考试数学(文)试题陕西省咸阳市高新一中2023届高三下学期第八次质量检测文科数学试题(已下线)专题13立体几何(解答题)(已下线)专题11 空间图形的表面积与体积-期中期末考点大串讲(苏教版2019必修第二册)(已下线)期末复习07 空间几何线面、面面垂直-期末专项复习
名校
解题方法
5 . 已知直棱柱
的底面ABCD为菱形,且
,
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/5/bf4f4ba7-42b3-42a0-8813-ce7348d4c82c.png?resizew=206)
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ac37630bf01a67dab22f61ce6e726a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db57eca2a7cbd91bc57372592580a76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/5/bf4f4ba7-42b3-42a0-8813-ce7348d4c82c.png?resizew=206)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e106d67ff8828b5fb9165de66ea28da7.png)
您最近一年使用:0次
2023-03-04更新
|
1249次组卷
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9卷引用:河南省焦作市博爱县第一中学2022-2023学年高二下学期4月月考数学试题
河南省焦作市博爱县第一中学2022-2023学年高二下学期4月月考数学试题江西省南昌市2023届高三第一次模拟测试数学(文)试题四川省内江市第六中学2022-2023学年高二下学期第一次月考数学(文科)试题(已下线)期中考试测试(基础)-2022-2023学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)专题13立体几何(解答题)(已下线)立体几何专题:空间几何体体积的5种题型(已下线)专题20 空间几何解答题(文科)-2山东省滕州市第五中学2022-2023学年高一下学期5月月考数学试题河北省石家庄师大附中2022-2023学年高一下学期第三次月考数学试题
解题方法
6 . 在如图所示的几何体
中,
底面
,底面
是边长为4的正方形,其中心为P,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/42562408-3414-4b7d-babd-47f920f365fa.png?resizew=195)
(1)求三棱锥
的体积;
(2)求二面角
的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fc1129846f37afdafd751627c450d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd3bc5c12b7f2e3974daf5d129f8b33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b70c03f14f9f5c55c5b8d536437b90.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/12/42562408-3414-4b7d-babd-47f920f365fa.png?resizew=195)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437c9774700f6c066b3e19d17d54b368.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89c9c2c831a0552a7c934365bc49ad3f.png)
您最近一年使用:0次
名校
7 . 如图,圆台
的轴截面为等腰梯形
,
,B为底面圆周上异于A,C的点.
内,过
作一条直线与平面
平行,并说明理由;
(2)设平面
∩平面
,
与平面QAC所成角为
,当四棱锥
的体积最大时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b8c6d80251fdeabfebd65bca460d55b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f664c0db517bec6886ff0b6100fd474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc9ffc43a56921fe79f8602636b8b0f.png)
(2)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc9ffc43a56921fe79f8602636b8b0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0bd886276f8ff9df2a42013b337d726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29a0c82028e1259f300facd32775a15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c6c1f6d821af7e3c8058993218a861.png)
您最近一年使用:0次
2023-02-25更新
|
2345次组卷
|
8卷引用:河南省焦作市博爱县第一中学2024届高三下学期第二次模拟考试数学试题
名校
解题方法
8 . 如图所示,在四棱锥
中,底面
是边长为4的正方形,
,点
在线段
上,
,点
分别是线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/3/744d2351-63e3-42ff-8fa2-c33b85798193.png?resizew=189)
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](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/d3e05b6d03d24f932d6df32afe14aa79.png)
![](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/eae25bdfe94839f26e9a151d33e44723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf33d73483c93f24cc6a1d76ef22ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481e426224c3a3ce9bb5a731eed81c40.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/3/744d2351-63e3-42ff-8fa2-c33b85798193.png?resizew=189)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9bbc7e0de28c652ae10a8db5b4e2687.png)
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2022-07-02更新
|
554次组卷
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4卷引用:河南省焦作市2021-2022学年高一下学期期末数学试题
名校
9 . 如图,多面体
中,
平面
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0ae57ea3922dd4d1493a4a8e040995.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/b4fbd5a6-8069-4979-a39e-66b633f7572e.png?resizew=153)
(1)在线段
上是否存在一点
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
平面
?如果存在,请指出
点位置并证明;如果不存在,请说明理由;
(2)当三棱锥
的体积为8时,求平面
与平面AFC夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8df226cdfaf59a111f778ce07d33d06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee21949feefb980c0d65587ff0497d58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0ae57ea3922dd4d1493a4a8e040995.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/b4fbd5a6-8069-4979-a39e-66b633f7572e.png?resizew=153)
(1)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a0d238b6e9b49bbea22a79402e8e4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(2)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e024a87e5b48bfa241169def613104.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29319a28b4ab8cc3a20f0673fd0c24c0.png)
您最近一年使用:0次
2022-05-31更新
|
1653次组卷
|
5卷引用:河南省焦作市博爱县第一中学2023-2024学年高二上学期期中数学试题
解题方法
10 . 在如图所示的几何体中,四边形
是矩形,
平面
,
,
,
为
与
的交点,点H为棱
的中点.
![](https://img.xkw.com/dksih/QBM/2022/4/10/2955254716235776/2955325558464512/STEM/8d9f533a13a042edbb8396dd93eb6051.png?resizew=198)
(1)求证:
平面
;
(2)求该几何体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b26027dab99c33a03acc66b502f6229e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb1c586945c9232946acbf594f591c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://img.xkw.com/dksih/QBM/2022/4/10/2955254716235776/2955325558464512/STEM/8d9f533a13a042edbb8396dd93eb6051.png?resizew=198)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbe71587bb49d964250e0cbcb654c3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
(2)求该几何体的体积.
您最近一年使用:0次
2022-04-10更新
|
954次组卷
|
3卷引用:河南省焦作市2021-2022学年高三年级第二次模拟考试(文)试题
河南省焦作市2021-2022学年高三年级第二次模拟考试(文)试题(已下线)秘籍06 立体几何(文)-备战2022年高考数学抢分秘籍(全国通用)第六章 立体几何初步(A卷·夯实基础) -2021-2022学年高一数北师大版2019必修第二册