解题方法
1 . 在三棱锥
中,
平面
分别是棱
的中点,
,则直线
与平面
所成角的正弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce54f18bbf2aa43bb76db15f3f2f526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea8eea77d3780398d78a9b5bd61a65c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f128c87fd0414aea9aba7cfccd6ce99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-01-23更新
|
145次组卷
|
4卷引用:内蒙古赤峰市松山区赤峰学院附属中学2023-2024学年高二上学期1月期末数学试题
解题方法
2 . 如图,在四棱锥
中,平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
平面
,侧面
是边长为
的正三角形,底面
为矩形,
,点
是
的中点,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/93a341c4-359a-46df-b8eb-927bde38ee5e.png?resizew=172)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4836945f324c29ef818b423bcc017a93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/93a341c4-359a-46df-b8eb-927bde38ee5e.png?resizew=172)
A.![]() ![]() |
B.![]() ![]() ![]() |
C.点![]() ![]() ![]() |
D.三棱锥![]() ![]() |
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3 . 已知
是空间的一个单位正交基底,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed18a92338c7578c18a5ba3a2ae1ed4.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
名校
解题方法
4 . 如图,在多面体中,平面
平面
,四边形
为正方形,四边形
为梯形,且
,
.
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932a04304f2d4975955d4baabb2deeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6114761b369162cda06f08e31c23fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258ed4f5282317bb067a41104d559222.png)
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2024-01-21更新
|
143次组卷
|
2卷引用:内蒙古自治区赤峰市红山区2023-2024学年高二上学期期末学情监测数学试卷(A)
5 . 已知向量
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bedefe621b620eded490961c578d4c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf5c1d124e8e023fe8e8c5ef3412813.png)
A.-2 | B.2 | C.![]() | D.![]() |
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解题方法
6 . 在空间直角坐标系中,已知向量
是平面
的一个法向量,且
,则直线
与平面
所成角的正弦值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c38b8a48e810014862c9c4b2009e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ad7ff89ac7e00afb5ba8293a5a7372e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-01-18更新
|
232次组卷
|
2卷引用:内蒙古巴彦淖尔市2023-2024学年高二上学期期末考试数学试题
解题方法
7 . 如图1,在直角梯形ABCD中,
,
,
,E是AD的中点,O是AC与BE的交点.将
沿BE折起到如图2中
的位置,得到四棱锥
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/afcf2b45-159e-49f4-8a4a-0cca56632358.png?resizew=353)
(1)证明:
;
(2)当平面
平面
时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e62ca104bd39a1646922b5836f1826b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdfe7976bd3f16bfef5c6f1b4f20f23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2db2b1c641b93caae9b7a82441e4ba70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/25/afcf2b45-159e-49f4-8a4a-0cca56632358.png?resizew=353)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ed2a23c5569ecf4ab6ccf927a4ab46f.png)
(2)当平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c44c1843ff6150ebc6aad3e34e477d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f56aa9529f74055afd5a6c4bf5de86d.png)
您最近一年使用:0次
8 . 《九章算术》中,将底面为长方形且有一条侧棱与底面垂直的四棱锥称之为阳马,将四个面都为直角三角形的三棱锥称之为鳖臑.若三棱锥
为鳖臑,
平面
,
,
,三棱锥
的四个顶点都在球O的球面上,则球O的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7b6d04f024ca05cdfacc8ce9137c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-01-12更新
|
694次组卷
|
6卷引用:内蒙古呼和浩特市2024届高三上学期学业质量监测数学(文)试题
内蒙古呼和浩特市2024届高三上学期学业质量监测数学(文)试题(已下线)重难点6-3 立体几何外接球与内切球问题(12题型+满分技巧+限时检测)(已下线)第05讲 8.3.2 圆柱、圆锥、圆台、球的表面积和体积-【帮课堂】(人教A版2019必修第二册)(已下线)第二章 立体几何中的计算 专题六 几何体的外接球、棱切球、内切球 微点2 长方体切割体及其模型综合训练【基础版】(已下线)专题1 鳖臑阳马 巧用性质 练(已下线)专题13.8外接球与内切球3大题型13个方向-重难点突破及混淆易错规避(苏教版2019必修第二册)
名校
解题方法
9 . 已知直线
、m、n与平面
、
,下列命题正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
A.若![]() ![]() ![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() | D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
2024-01-12更新
|
503次组卷
|
3卷引用:内蒙古呼和浩特市2024届高三上学期学业质量监测数学(文)试题
内蒙古呼和浩特市2024届高三上学期学业质量监测数学(文)试题(已下线)2024年高考数学二轮复习测试卷(新题型地区专用)福建省永春一中、培元中学、石光中学、季延中学2024届高三下学期第二次联合考试数学试题
名校
10 . 小明将
与等边
摆成如图所示的四面体,其中
,
,若
平面
,则四面体
外接球的表面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/26/f319221b-6e93-4b0f-865e-4b21fc81f950.png?resizew=122)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16834582e86f9c1030a4a4b316fab909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08e39fda3cda5ddc03b085413f2030aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f17edac849a0691e52146021e05d83e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/26/f319221b-6e93-4b0f-865e-4b21fc81f950.png?resizew=122)
A.![]() | B.![]() | C.![]() | D.![]() |
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