1 . 正方体
的棱长为
,已知平面
,则关于
截此正方体所得截面的判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e8a2bee9b585a1a50521421df751bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.截面形状可能为正三角形 |
B.截面形状可能为正方形 |
C.截面形状可能为正六边形 |
D.截面面积最大值为![]() |
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名校
解题方法
2 . 已知正方体
的棱长为4,其中P为
上的动点,Q为底面ABCD上的动点(包含边界),
,且PQ的中点为M.
(1)求
的最小值;
(2)当
时,试判断三棱锥
的体积是否为定值,并说明理由.
![](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/f4d14c6959273338a048b023805cce80.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e884ca9429486026caa5e2310b0e4e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f368b823bd228b81a9fd36716283659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf5ed0610e612cb57b547a2af05d90a.png)
您最近一年使用:0次
2023-12-13更新
|
100次组卷
|
2卷引用:河北省石家庄二十八中2023-2024学年高二上学期期中数学试题
名校
解题方法
3 . 如图,正方体
的棱长为1,E,F分别是棱
,
的中点,过直线
的平面分别与棱
,
交于点M,N,设
,给出下列三个结论:①四边形
一定为菱形;②若四边形
的面积为
,
,则
有最大值;③若四棱锥
的体积为
,
,则
为常值函数.其中正确结论有多少个?( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/b30ed541-c8ff-4869-8fc7-c7fbd28c1b3b.png?resizew=161)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b25f3ea33cc08b1e2a0d9c3a9dccaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f2a9b923a355694ea487f6c5669a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e92eac740953aa383be636ea90fd47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e92eac740953aa383be636ea90fd47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f56fa5f9c9f324859bde42ee3ca620db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c7b69e93488fcd2a195cb9793e94fc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b941daa059b04aab552429ae22a1661d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3916aacf0509ae7ad573aa3b1dc34ac2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a5f485aa5bcff83de6a238f7c8f712.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/b30ed541-c8ff-4869-8fc7-c7fbd28c1b3b.png?resizew=161)
A.0 | B.1 | C.2 | D.3 |
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4 . 已知为圆锥
底面圆
的直径,
,
,点
为圆
上异于
的一点,
为线段
上的动点(异于端点),则( )
A.直线![]() ![]() ![]() |
B.圆锥![]() ![]() |
C.棱长为![]() ![]() |
D.当![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-12-02更新
|
605次组卷
|
3卷引用:安徽省黄山市八校联盟2023-2024学年高二上学期期中考试数学试题
解题方法
5 . 已知长方体
的棱
,
,点
满足:
,
,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1a56baf43ffdf67bc8460856e31fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ae7072624587654d162548a80d7a1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347853cebe065eac4cab2305cf71582c.png)
A.当![]() ![]() ![]() ![]() ![]() |
B.当![]() ![]() ![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() |
您最近一年使用:0次
6 . 如图所示四棱锥
中,
底面
,四边形
中,
,
,
,
.
(1)求证:
平面
;
(2)求直线
与平面
所成的角的正弦值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1e04eeb4de72e5750dae77bcb6f88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81981fd7b343f4fe2db8f36eb66c1ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/a97b2abf-b2a2-4c88-a593-6c6f5a35ab82.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
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7 . 如图,直四棱柱
中,底面
为等腰梯形,其中
,
,
,
,N为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/51be6784-d6ab-4053-92ee-9b42b259b401.png?resizew=157)
(1)若平面
交侧棱
于点P,求证:
,并求出AP的长度;
(2)求平面
与底面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/0cad8b2d5a892c557a5bc7650bf4dcb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4771a646e2d9895a2d4e44184ca0c558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/51be6784-d6ab-4053-92ee-9b42b259b401.png?resizew=157)
(1)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27ed8cad5482fe2742ef4aa65d1ddcb.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2023-11-29更新
|
405次组卷
|
2卷引用:山东省烟台市部分学校联考2023-2024学年高二上学期学业水平诊断数学试题
解题方法
8 . 如图,在正四棱台中,
,
,
,则该棱台的体积为
到面
的距离为
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解题方法
9 . 已知四棱锥
中,底面
是边长为2的正方形,
平面
,
,且以
为圆心、
为半径的圆分别交
,
于
,
两点,点
是劣弧
上的动点,其中
,则( )
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e124a392dc84fcc1662fe6d896aa12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8c9ac405301d3c27523ee19ba415315.png)
A.弧![]() ![]() ![]() ![]() ![]() |
B.弧![]() ![]() ![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-11-29更新
|
81次组卷
|
2卷引用:山东省潍坊市北约联盟2023-2024学年高二上学期11月阶段性监测数学试题
名校
解题方法
10 . 如图,已知三棱锥
中,
平面
,
,
,
,
.
(1)求点
到平面
的距离;
(2)求三棱锥
的表面积.
![](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/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c3f13203c1915b104924f650fe4227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/2836b81f-dbd3-4d7b-83fd-b4f002469af5.png?resizew=152)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
2023-11-28更新
|
823次组卷
|
4卷引用:上海市民办新虹桥中学2023-2024学年高二上学期期中考试数学试卷
上海市民办新虹桥中学2023-2024学年高二上学期期中考试数学试卷上海市浦东新区进才中学2023-2024学年高二上学期12月月考数学试题8.6.2直线与平面垂直练习(已下线)第八章 立体几何初步(二)(知识归纳+题型突破)(2)-单元速记·巧练(人教A版2019必修第二册)