三棱锥
的侧棱
垂直于底面
,
,
,三棱锥
的体积
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39349977835adc3bb7d4fa91efd1396f.png)
A.三棱锥![]() | B.![]() |
C.![]() | D.三棱锥![]() ![]() |
2024·湖南长沙·二模 查看更多[2]
更新时间:2024-06-02 23:51:11
|
相似题推荐
多选题
|
较难
(0.4)
解题方法
【推荐1】如图,点
是棱长为
的正方体
的表面上一个动点,
,
,
平面
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d47ed867750dba3df7a4834827f272c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb71f0f687cc6a5806fdf5e5376aca3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a641eb5d8a88d348a24b78001508c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
A.三棱锥![]() | B.存在一点![]() ![]() |
C.动点![]() ![]() | D.五面体![]() ![]() |
您最近一年使用:0次
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解题方法
【推荐2】在棱长为1的正方体
中,
,
分别是
,
中点,
,
,
,
分别是线段
,
,
,
上的动点,则( )
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
A.存在点![]() ![]() ![]() |
B.三棱锥![]() |
C.![]() ![]() |
D.直线![]() ![]() ![]() |
您最近一年使用:0次
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解题方法
【推荐1】如图是一个装有水的全封闭直三棱柱容器
,
,
,若水的体积恰好是该容器体积的一半, 容器厚度忽略不计, 则( )
![](https://img.xkw.com/dksih/QBM/2023/7/11/3278825335701504/3279887951593472/STEM/1ad4ab79c74c4f53ba2932ba31126761.png?resizew=117)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c4340dcffb0783d118a587e5352a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28cbf909f9de1f137471feaa3bbe5094.png)
![](https://img.xkw.com/dksih/QBM/2023/7/11/3278825335701504/3279887951593472/STEM/1ad4ab79c74c4f53ba2932ba31126761.png?resizew=117)
A.转动容器, 当平面![]() ![]() ![]() |
B.当底面![]() ![]() ![]() |
C.在翻滚转动容器的过程中, 有水的部分可能是三棱锥 |
D.容器中水的体积与直三棱柱外接球体积之比至多为![]() |
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解题方法
【推荐2】已知棱长为2的正方体
的棱切球(与正方体的各条棱都相切)为球
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
A.球![]() ![]() |
B.球![]() ![]() |
C.球![]() ![]() |
D.球![]() ![]() |
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【推荐1】如图,圆台
的上、下底面圆的半径之比为
,其侧面展开图是一个圆心角为
,面积为
的扇环,四边形
是过
的轴截面,
分别为下底面圆上两点,
为上底面圆上一点,且
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/c5a14a70-4d7a-404c-9067-774c5478802c.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d65e051e943ab28fa57aee2fb57994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e95a79288fcb7e47fba4410722e2bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4935be75c96693d1f023cac9aca52c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/c5a14a70-4d7a-404c-9067-774c5478802c.png?resizew=135)
A.该圆台的体积为![]() |
B.平面![]() ![]() |
C.![]() ![]() ![]() |
D.该圆台的外接球的表面积为![]() |
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【推荐2】棱长为6的正四面体
的四个顶点均在球
的表面上,若点
为球面上的任意一点,则
的取值可以为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bf0c28a98c51d3d7d458eecac23ebd.png)
A.![]() | B.3 | C.5 | D.![]() |
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【推荐1】如图,在圆锥
中,
,
是圆
上的动点,
是圆
的直径,
,
是
的两个三等分点,
,记二面角
,
的平面角分别为
,
,若
,则
的值可能为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/27/2cf205dd-a986-456f-a0ec-f22cc6e4339c.png?resizew=163)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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【推荐2】在直三棱柱
中,
,
,点
分别是
,
的中点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10d461a7c0b86a2f09c2ea17f38260e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/051128348c7ec62e73e2ab285683b7ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a696a182fff038a86b2bbe8ca099442.png)
A.![]() ![]() |
B.异面直线![]() ![]() ![]() |
C.若点![]() ![]() ![]() ![]() |
D.点![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次