1 . 如图,正方形
和矩形
所在的平面互相垂直.点
在正方形
及其内部运动,点
在矩形
及其内部运动.设
,给出下列四个结论:
,使
;
②存在点
,使
;
③到直线
和
的距离相等的点
有无数个;
④若
,则四面体
体积的最大值为
.
其中所有正确结论的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef70144bea23fc8154301b246bf3ef14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f1c40ebcc993a5778478154c124f0c.png)
②存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b9d4191b4dc51fddb22d1faf650c3b.png)
③到直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f138877b595987abf3397aab8f9895e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3019bf62527f7e614c49b803d7b59d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
其中所有正确结论的序号是
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解题方法
2 . 已知某几何体的三视图如图所示,若
是
的中点,
是
的四等分点(靠近点
),则下列说法正确的是______ .(请填写所有正确答案的序号)
①
;②
平面
;③
;④三棱锥
的体积为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71c42aa655ed5ee6c93db5ccd25182f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2462277c4e7121779105a482b2cd9398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beadde16d15c23457fc5ef74feb6f12e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e155ff3b596343d686fcfb40c3f01edd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/990cc4a6-85f7-4920-8da6-93374a092a07.png?resizew=278)
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解题方法
3 . 如图,在三棱锥
中,三条侧棱OA,OB,OC两两垂直,且
,M为
内部一动点,过M分别作平面OAB,平面OBC,平面OAC的垂线,垂足分别为P,Q,R.
![](https://img.xkw.com/dksih/QBM/2022/5/7/2974506010230784/2975624099708928/STEM/2b11d325-7f6d-4c17-85a9-065fc761d527.png?resizew=271)
①直线PR与直线BC是异面直线;
②
为定值;
③三棱锥
的外接球表面积的最小值为
;
④当
时,平面PQR与平面OBC所成的锐二面角为45°.
则以上结论中所有正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4278c0911e7df78965e78cff69cac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbab39da847da8a559994b6c6004aa60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2022/5/7/2974506010230784/2975624099708928/STEM/2b11d325-7f6d-4c17-85a9-065fc761d527.png?resizew=271)
①直线PR与直线BC是异面直线;
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4389530f4d31bc0ae46d0edfcdd2dd.png)
③三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64bab74dadb5557a3762947e52feb532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4966e5af166b69a0a38a98abf555b6b.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38db6f3badb51bef6fa220ce110af854.png)
则以上结论中所有正确结论的序号是
您最近一年使用:0次
2022-05-09更新
|
514次组卷
|
3卷引用:四川省南充市2022届高三下学期高考适应性考试(三诊)数学(理)试题
解题方法
4 . 如图,在正三棱柱
中,
,
,P为线段
上的动点,且
,则下列命题中正确的是___________ .
![](https://img.xkw.com/dksih/QBM/2022/3/25/2943953569005568/2946520702754816/STEM/657b1c20-82a8-4916-952e-b4045e66b05a.png?resizew=138)
(1)存在
使得
;
(2)当
时,异面直线
和
所成角的余弦值为
;
(3)当
时,三棱锥
的外接球体积为
;
(4)过P且与直线
和直线
所成角都是60°的直线有三条.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca37feb165ab4711a42c47fe929e5624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ab543282d9b830fda43ddf62762208.png)
![](https://img.xkw.com/dksih/QBM/2022/3/25/2943953569005568/2946520702754816/STEM/657b1c20-82a8-4916-952e-b4045e66b05a.png?resizew=138)
(1)存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90bcfd448fc7d2d52b55874c9e6201e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f83464bf17f9d4d9ee6a7f299539871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ff310aabd2282b539537ebed3f788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588eb9393564a33552c4b2e8de837ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131cfa82f83b885d57a05235463d1b03.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c117ff1623684173352cf7271248239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d10ac1b9cfcd8e651f99713e18e621.png)
(4)过P且与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
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名校
5 . 设棱长为2的正方体
,
是
中点,点
、
分别是棱
、
上的动点,给出以下四个结论:
①存在
;
②存在
平面
;
③存在无数个等腰三角形
;
④三棱锥
的体积的取值范围是
.
则所有结论正确的序号是______ .
![](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/03902478df1a55bc99703210bccab910.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
①存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d2909b0333b9b28c081c68cde04f96.png)
②存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf663ee2bf1ac5c43f4306fa0cf250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/590d2b3c62a9c24be67a0bc8a8f6c057.png)
③存在无数个等腰三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868a98a5d6337c3dd9bca228e3545665.png)
④三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89c68898e115b33957e49efdae523cde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85e612714cb045799fb2abc4a98ec10e.png)
则所有结论正确的序号是
您最近一年使用:0次
2022-03-10更新
|
1522次组卷
|
5卷引用:北京平谷区2022届高三零模数学试题
北京平谷区2022届高三零模数学试题北京市第一六一中学2022届高三考前热身训练数学试题(已下线)数学-2022年高考押题预测卷01(北京卷)北京市清华附中2023届高三下学期3月调研数学试题(已下线)专题01 空间向量与立体几何(6)
名校
6 . 如图,正方体
中,点
,
是
上的两个三等分点,点
,
是
上的两个三等分点,点
,
,
分别为
,
和
的中点,点
是
上的一个动点,下面结论中正确的是___________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/1b7863af-c10b-4615-88d2-f0ace81ee153.png?resizew=170)
①
与
异面且垂直;
②
与
相交且垂直;
③
平面
;
④
,
,
,
四点共面.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/394c5d2f55221975503be8aa18022480.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/dad2a36927223bd70f426ba06aea4b45.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/1b7863af-c10b-4615-88d2-f0ace81ee153.png?resizew=170)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09fada3d4674aa1e2ea349a053942212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecf35bb2453db07d66391f501fa7a1a.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8346fe1768259532eab949b0ac52c79f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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2021-04-23更新
|
1088次组卷
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4卷引用:四川省绵阳市2021届高三三模数学(理)试题
四川省绵阳市2021届高三三模数学(理)试题(已下线)押第16题 立体几何综合-备战2021年高考数学(理)临考题号押题(全国卷2)(已下线)解密12 空间向量在空间几何体中应用(分层训练)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(新高考专用)四川省泸县第一中学2023届高三二诊模拟考试数学(理)试题