名校
解题方法
1 . 如图,在四棱锥
中,
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1aaf71cdccea88efde50aecba5a503.png)
,点
是
的重心.
平面
;
(2)若直线
与平面
所成角的正弦值为
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1aaf71cdccea88efde50aecba5a503.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6b4e5b801be36880ccdf55260d89cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c14ff9b66f21c05e52dc3c8908c2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
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2023-12-28更新
|
1420次组卷
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7卷引用:江苏省南通市海安高级中学2024届高三上学期12月月考数学试题
2 . 如图,在梯形ABCD中,
,将
沿着BD折起到
的位置,使得平面
平面
.
;
(2)点M满足
,若二面角
的余弦值为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e676a2e6a726ef5bd14b17c13c9f97f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acee03d4bb4667b6c345221b6c9b0fa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60334b062acf697efaa4f3f7087a80dc.png)
(2)点M满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7e488c5c5501d7dc9cd94647200ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b70049601f57c8a2ece170c0a9c3c05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2023-12-27更新
|
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3卷引用:湖北省宜荆荆随恩2024届高三上学期12月联考数学试题
名校
3 . 如图,在棱长为1的正方体
中,
分别是
的中点,则以下说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b199a99e53d67ff4abf233930961a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/744096649aef7e210b191091e9f6c51b.png)
A.![]() |
B.直线EG与平面ABCD所成角的正弦值为![]() |
C.异面直线EG和BC所成角的余弦值为![]() |
D.若动直线A1M与直线AC的夹角为30°,且与平面EFG交于点M,则点M的轨迹构成的图形的面积为![]() |
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2023-12-25更新
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2卷引用:山东省新泰市第一中学(实验部)2024届高三上学期第二次月考数学试题
名校
解题方法
4 . 已知α、β是空间中两个不重合的平面,m、n是空间中两条不同的直线,则下列命题中正确的是( )
A.若![]() ![]() ![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() | D.若![]() ![]() ![]() ![]() |
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2023-12-25更新
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3卷引用:新疆乌鲁木齐市兵团二中2024届高三上学期第四次月考数学试题
名校
解题方法
5 . 如图,正方体
中,E,F分别是棱
,
的中点,若正方体的棱长为2,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
A.点D到平面![]() ![]() |
B.直线![]() ![]() |
C.直线![]() ![]() ![]() |
D.平面![]() ![]() ![]() ![]() |
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2023-12-22更新
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4卷引用:山东省枣庄市薛城实验中学等校2023-2024学年高二上学期12月大联考数学试题
名校
解题方法
6 . 正方体
棱长为2,E,F分别是棱
,
的中点,M是正方体的表面上一动点,当四面体
的体积最大时,四面体
的外接球的表面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba5627b81d85bbe3bc00f8d070bfd6fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba5627b81d85bbe3bc00f8d070bfd6fc.png)
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2023-12-22更新
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2卷引用:重庆市沙坪坝区重庆一中2024届高三上学期12月月考数学试题
解题方法
7 . 如图,在长方体
中,其表面积与12条棱长之和均为24,E,G分别为棱
,
的中点,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/d6ee6534-446a-4a2d-a18c-0e9dfe040e72.png?resizew=174)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/d6ee6534-446a-4a2d-a18c-0e9dfe040e72.png?resizew=174)
A.该长方体的外接球表面积为![]() |
B.![]() ![]() |
C.若线段![]() ![]() ![]() ![]() |
D.平面![]() ![]() ![]() |
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2023-12-22更新
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143次组卷
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2卷引用:江西省2024届高三上学期12月统一调研测试数学试题
名校
解题方法
8 . 如图,已知四棱锥
的底面
是直角梯形,
,
,
,
平面
,
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81981fd7b343f4fe2db8f36eb66c1ce7.png)
A.![]() ![]() ![]() |
B.![]() ![]() ![]() |
C.平面![]() ![]() ![]() |
D.![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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2023-12-21更新
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415次组卷
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4卷引用:四川省遂宁市蓬溪中学校2023-2024学年高二上学期12月月考数学试题
名校
9 . 如图所示的六面体中,
,
,
两两垂直,
连线经过三角形
的重心
,且
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/09457a3d-4a27-4e4f-acdc-aef9a4bd959c.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09fcb20a6972108871adbf284f9e5006.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/f07e98f7a65097311e8d93bd9f2af26e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/09457a3d-4a27-4e4f-acdc-aef9a4bd959c.png?resizew=160)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() |
D.若点![]() ![]() ![]() |
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2023-12-20更新
|
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3卷引用:山东省潍坊市2024届高三上学期普通高中学科素养能力测评数学试题
名校
10 . 已知
、
分别为棱长为2的正方体
棱
、
上的动点,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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
A.线段![]() |
B.三棱锥![]() ![]() |
C.直线![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() ![]() |
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2023-12-19更新
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2卷引用:湖北省宜荆荆随恩2023-2024学年高二上学期12月联考数学试卷