已知正方体
的边长为2,
为
的中点,
为侧面
上的动点,且满足
平面
,则下列结论正确的个数是( )
①
②
平面
③动点
的轨迹长为
④
与
所成角的余弦值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe2c533dbc23a34518f72f3cb14f330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f33fa5152ba27f7b8a28890cefca219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d808a1351940a41a2ba27ab26d7fc680.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7707ef25a3d4412fe6cc77a8810df24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd98a2b9df67504e9f276e9a03d03432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d808a1351940a41a2ba27ab26d7fc680.png)
③动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6836c9e3e3001df21030fbda3802b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe2c533dbc23a34518f72f3cb14f330.png)
A.0 | B.1 | C.2 | D.3 |
2023·四川泸州·模拟预测 查看更多[3]
四川省叙永第一中学校2024届高三上学期数学(理)“一诊”模拟测试(二)试题(已下线)模块一 专题1 《立体几何》单元检测篇 B提升卷(已下线)专题04 异面直线所成的角(期末选择题4)-2023-2024学年高二数学上学期期末题型秒杀技巧及专项练习(人教A版2019)
更新时间:2023-11-12 10:41:43
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【推荐1】清初著名数学家孔林宗曾提出一种“蒺藜形多面体”,其可由两个正交的正四面体组合而成,如图1,也可由正方体切割而成,如图2.在图2所示的“蒺藜形多面体”中,若
,则给出的说法中错误命题有几个( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/27/c01cd297-e328-4168-88a3-6540a810e8e6.png?resizew=316)
(1)该几何体的表面积为
;
(2)该几何体的体积为
;
(3)二面角
的余弦值为
;
(4)若点
、
在线段
、
上移动,则
的最小值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/27/c01cd297-e328-4168-88a3-6540a810e8e6.png?resizew=316)
(1)该几何体的表面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9bb52bec7f09eaf568dca3b4a4fc717.png)
(2)该几何体的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
(3)二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edf1c87e81e7180f9d124d7daa84191c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30d314a642667fef559032264647366.png)
(4)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】关于空间直角坐标系
中的一点
,有下列说法:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8b9055b2a10a8028a946e1d5c473577.png)
①点到坐标原点的距离为
;
②的中点坐标为
;
③点关于
轴对称的点的坐标为
;
④点关于坐标原点对称的点的坐标为
;
⑤点关于坐标平面
对称的点的坐标为
.
其中正确的个数是
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【推荐1】如图,已知正方体
的棱长为
,
是
的中点,点
在侧面
(含边界)内,若
,则
面积的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/55e73eb2-ca3a-4130-a2c1-22b5186fde55.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cc064d914c1b4191d00f4b00032aad.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/55e73eb2-ca3a-4130-a2c1-22b5186fde55.png?resizew=163)
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【推荐2】在长方体
中,E是
的中点,
,且
平面
,则实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72545bef56c4e32d1b76489bd32c3842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86814dbae9a5343d69bb4647900b3bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e008512d0726544576fef62bef35f748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac377d02daf9406103454d801c7d105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9faeed172ec5b88966b0d1c52748d41.png)
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【推荐1】已知在正方体
中,E,F分别为
,
的中点,点P在
上运动,若异面直线
,
所成的角为
,则
的最大值为( )
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【推荐2】在三棱锥
中,
平面
,
是正三角形,
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,
是棱
上一点,使异面直线
与
所成角的余弦值
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( )
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