名校
解题方法
1 . 设
为某正方体的一条体对角线,
为该正方体的各顶点与各棱中点所构成的点集,若从
中任选两点连成线段,则与
垂直的线段数目是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
A.12 | B.21 | C.27 | D.33 |
您最近一年使用:0次
2024-05-31更新
|
350次组卷
|
2卷引用:2024届山东省五莲县第一中学高考模拟(二)数学试题
2 . 如图,
中,
,
,
是
中点,
是
边上靠近
的四等分点,将
沿着
翻折,使点
到点
处,得到四棱锥
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/7cadfba3-018c-4a89-a54c-8106c331224f.png?resizew=226)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37750daa8ba3b3fe3e9e2092f81c848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943ccc973348b6a636540efdb6d1638f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/7cadfba3-018c-4a89-a54c-8106c331224f.png?resizew=226)
A.记平面![]() ![]() ![]() ![]() ![]() |
B.记直线![]() ![]() ![]() ![]() ![]() ![]() |
C.存在某个点![]() ![]() ![]() |
D.四棱锥![]() ![]() |
您最近一年使用:0次
名校
解题方法
3 . 直四棱柱
,所有棱长都相等,且
,
为
的中点,
为四边形
内一点(包括边界),下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e0b64d25ddd18454f88e40c45d7d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
A.平面![]() ![]() |
B.![]() ![]() |
C.平面![]() ![]() ![]() |
D.![]() |
您最近一年使用:0次
2023-11-03更新
|
1045次组卷
|
4卷引用:山东省德州市2024届高三上学期适应性联考(一)数学试题
山东省德州市2024届高三上学期适应性联考(一)数学试题(已下线)第一章 点线面位置关系 专题二 空间垂直关系的判定与证明 微点4 空间垂直关系的判定与证明综合训练【培优版】江苏省苏州市西交大苏州附中2024届高三上学期12月月考数学试题(已下线)模块六 全真模拟篇 拔高2 期末终极研习室(2023-2024学年第一学期)高三
解题方法
4 . 如图1,在边长为4的菱形
中,
,
,
分别为
,
的中点,将
沿
折起到
的位置,得到如图2所示的三棱锥
.
;
(2)
为线段
上一个动点(
不与端点重合),设二面角
的大小为
,三棱锥
与三棱锥
的体积之和为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284e282bb1d9fbf8634b3506ee5358ab.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a33d27a9c655d01f606e9bce02b0a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aedb55703d202771dd11987cf4f30bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432129b84db4beea3395281639c6684e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f4e64c96f4c48b158c7f918243fbd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d90f940f5693b22ddf2e7c761887d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d7b329612a9159b0b2dce46120b409e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
您最近一年使用:0次
2023-07-11更新
|
454次组卷
|
2卷引用:山东省泰安市2022-2023学年高一下学期期末数学试题
解题方法
5 . 在正四棱锥
中,
,
,过侧棱
的延长线上一点
作与平面
平行的平面,分别与侧棱
,
,
的延长线交于点
,
,
.设几何体
和几何体
的外接球半径分别为
和
,当
最小时,
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cedd51383f8f047f565191b128cec637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeebacd7456b6471fd185e4cb8356a2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724625d4f91f0e48712d6d143a6389b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efc18a5bb2e53586331b2a58538a48b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f20f21a9d50b61dac519a3ddab539d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/957893cf7210e66bd614e9e00dc9ff5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b09fed6ffd4867550ea35301ca3acdf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
6 . 如图,已知圆柱的上,下底面圆心分别为
是圆柱的轴截面,正方形ABCD内接于下底面圆Q,
.
![](https://img.xkw.com/dksih/QBM/2021/12/21/2877184706306048/2916904990130176/STEM/69f5bc23f7314f5c8dabf6d4b54890aa.png?resizew=126)
(1)当k为何值时,点Q在平面PBC内的射影恰好是△PBC的重心;
(2)若
,当平面PAD与平面PBC所成的锐二面角最大时,求该锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54840995c545df777ab9196813ddc5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667206277277c8a79bd370cb167a6acd.png)
![](https://img.xkw.com/dksih/QBM/2021/12/21/2877184706306048/2916904990130176/STEM/69f5bc23f7314f5c8dabf6d4b54890aa.png?resizew=126)
(1)当k为何值时,点Q在平面PBC内的射影恰好是△PBC的重心;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad013ed89855a7f3c795c48bc7c91f1.png)
您最近一年使用:0次
2022-02-15更新
|
1304次组卷
|
2卷引用:山东省潍坊市2021-2022学年高三上学期学科核心素养测评数学试题