1 . 在四棱锥P-ABCD中,点E为PA中点,BE⊥PD,PA=PB=PD,AB=AD=
CD=2,∠DAB=60°.
(2)求BE与平面ABCD所成角的正弦值;
(3)若CD//AB,求四棱锥P-ABCD的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)求BE与平面ABCD所成角的正弦值;
(3)若CD//AB,求四棱锥P-ABCD的体积.
您最近一年使用:0次
2022-07-14更新
|
514次组卷
|
2卷引用:安徽省合肥市庐江县2022-2023学年高一下学期7月期末教学质量抽测数学试题
名校
解题方法
2 . 如图所示,在三棱柱
中,侧面
为菱形,
,侧面
为正方形,平面
平面
,点
为
的中点,点
为
上的动点,设
.
![](https://img.xkw.com/dksih/QBM/2022/7/7/3017464527691776/3019859114967040/STEM/6441738830a0430894a5217dd5d1cf55.png?resizew=201)
(1)当
为何值时,
平面
? 并加以证明.
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16770ab0843b47c82113a7a856194c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8b5a6dbcf05f572f83f51abf7d668c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7651244f4db0a782c944b899cae2ae10.png)
![](https://img.xkw.com/dksih/QBM/2022/7/7/3017464527691776/3019859114967040/STEM/6441738830a0430894a5217dd5d1cf55.png?resizew=201)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdaa8065bea92fe61bce56090d8cb235.png)
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解题方法
3 . 在直三棱柱
中,
,
,若三棱锥
的外接球的半径为
,则三棱锥
的体积的最大值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686849a983d24dd62270b2967708cc24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/244cb0250603db646d04fbd92bc88e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619096595112f0340a43b756e114dd3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43920f8e9dd229ee8e362a683a5b6b50.png)
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4 . 棱长为1的菱形
中,
,
和
相交于点O,将
沿
折起,使点A到达P的位置,连接
,得到四面体
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb552b9e21dbaba74d11aa747790.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/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a9ec3b527947cad9caa4537e0cb7e7.png)
A.四面体![]() ![]() ![]() |
B.![]() |
C.四面体![]() ![]() |
D.直线![]() ![]() |
您最近一年使用:0次
名校
解题方法
5 . 如图所示,在三棱柱ABC-A1B1C1中,侧面ACC1A1为菱形,∠A1AC=60°,AC=2,侧面CBB1C1为正方形,平面ACC1A1⊥平面ABC.点M为A1C的中点,点N为AB的中点.
(1)证明:MN∥平面BCC1B1;
(2)求三棱锥A1-ABC1的体积.
(1)证明:MN∥平面BCC1B1;
(2)求三棱锥A1-ABC1的体积.
您最近一年使用:0次
2022-07-08更新
|
461次组卷
|
8卷引用:安徽省合肥世界外国语学校高中部2021-2022学年高一下学期期末数学试题
6 . 底面是菱形的直四棱柱
中,
,且
,
.
(1)求异面直线
与
所成角的余弦值;
(2)若
为线段
的中点,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fd676c41d2d644928f014b0fea4689.png)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe80a3270ed76c92ab4bdc4bc247e50.png)
您最近一年使用:0次
2022-07-08更新
|
479次组卷
|
3卷引用:安徽省蚌埠市2021-2022学年高一下学期期末数学试题
名校
解题方法
7 . 等边
的边长为
,过点
的直线
与过
的平面
交于点
.将平面
绕
转动(不与平面
重合),且三条直线
、
、
与平面
所成的角始终相等.当三棱锥
体积最大时,
与平面
所成角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
8 . 如图,已知正方体
的棱长为2,则下列四个结论中错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/22388173-317d-43e8-9a42-471e0c67fcf4.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/22388173-317d-43e8-9a42-471e0c67fcf4.png?resizew=167)
A.直线![]() ![]() | B.![]() ![]() |
C.平面![]() ![]() | D.三棱锥![]() ![]() |
您最近一年使用:0次
2022-07-07更新
|
1933次组卷
|
8卷引用:安徽省合肥市第六中学2021-2022学年高一下学期期末数学试题
安徽省合肥市第六中学2021-2022学年高一下学期期末数学试题吉林省普通高中友好学校联合体2022-2023学年高一下学期第三十六届基础年段期末联考数学试题河南省郑州市第四高级中学2021-2023学年高三第一次调研考试数学(文科)试题(已下线)第03讲 空间直线、平面的平行 (练)四川省峨眉文旅综合高中学校2022-2023学年高二上学期第一次月考数学试题(已下线)8.4.2 空间点、直线、平面之间的位置关系(分层作业)-【上好课】2022-2023学年高一数学同步备课系列(人教A版2019必修第二册)第八章立体几何初步章节验收测评卷-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)(已下线)8.5.3 平面与平面平行(2)-2022-2023学年高一数学《考点·题型·技巧》精讲与精练高分突破系列(人教A版2019必修第二册)
名校
9 . 已知三棱锥
的顶点都在球O的球面上,
是边长为3的等边三角形,若三棱锥
的体积的最大值为
,则球O的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7cb903441d8e6b4448c3d5d7959d9d7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
10 . 已知正方体
的棱长为1,P是线段
上一点,则三棱锥
的体积为________ ,
的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870e337da9544c85a5df7de34abcb686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86309337101620bdb1aa3ad39aeece5c.png)
您最近一年使用:0次