2024高三·全国·专题练习
1 . 在空间中,
是三条直线,任何两条直线垂直且异面,它们的距离均为2,求到这三条直线距离相等的点的轨迹.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8801df26d9cb76bc289b64a3a26902e.png)
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解题方法
2 . 有2024个半径均为1的球密布在正四面体
内(相邻两球外切,且边上的球与正四面体的面相切),则此正四面体的外接球半径为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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3 . 正多面体又称为柏拉图立体,是指一个多面体的所有面都是全等的正三角形或正多边形,每个顶点聚集的棱的条数都相等,这样的多面体就叫做正多面体.可以验证一共只有五种多面体.令
(
均为正整数),我们发现有时候某正多面体的所有顶点都可以和另一个正多面体的一些顶点重合,例如正
面体的所有顶点可以与正
面体的某些顶点重合,正
面体的所有顶点可以与正
面体的所有顶点重合,等等.
(1)当正
面体的所有顶点可以与正
面体的某些顶点重合时,求正
面体的棱与正
面体的面所成线面角的最大值;
(2)当正
面体在棱长为
的正
面体内,且正
面体的所有顶点均为正
面体各面的中心时,求正
面体某一面所在平面截正
面体所得截面面积;
(3)已知正
面体的每个面均为正五边形,正
面体的每个面均为正三角形.考生可在以下2问中选做1问.
(第一问答对得2分,第二问满分8分,两题均作答,以第一问结果给分)
第一问:求棱长为
的正
面体的表面积;
第二问:求棱长为
的正
面体的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/785869573d25ad8fe2cffd37dfcab4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8fa6d22b58fbd61c43ee524cb30394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(1)当正
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)当正
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)已知正
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(第一问答对得2分,第二问满分8分,两题均作答,以第一问结果给分)
第一问:求棱长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
第二问:求棱长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
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2023-11-10更新
|
557次组卷
|
3卷引用:上海师范大学附属中学闵行分校2023-2024学年高二上学期期中数学试题
上海师范大学附属中学闵行分校2023-2024学年高二上学期期中数学试题重庆市乌江新高考协作体2024届高三上学期高考第一次联合调研抽测数学试题(已下线)专题22 新高考新题型第19题新定义压轴解答题归纳(9大核心考点)(讲义)
解题方法
4 . 阅读数学材料:“设
为多面体
的一个顶点,定义多面体
在点
处的离散曲率为
,其中
为多面体
的所有与点
相邻的顶点,且平面
,平面
,…,平面
和平面
为多面体
的所有以
为公共点的面.”解答问题:已知在直四棱柱
中,底面
为菱形,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275fc582ec511e4c5a2a98f69da0cdff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20559c2fce92126341420a8170dacc2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183f3fdb3204864ff2f60c8c1dac2f2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db59863ffec5fa450ab8342fd8675c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d7f18c3c9dae7e6d4f2e96281289f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f733e19f18ab01a3c022331805ed58a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/eeed487430a5b8a330f2d0c52166521a.png)
A.直四棱柱![]() |
B.若![]() ![]() ![]() ![]() |
C.若四面体![]() ![]() ![]() ![]() ![]() |
D.若直四棱柱![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-04-13更新
|
2547次组卷
|
6卷引用:东北三省四市教研联合体2023届高三一模数学试题
东北三省四市教研联合体2023届高三一模数学试题吉林省长春市2023届高三三模数学试题辽宁省大连市2023届高三一模数学试题(已下线)模块六 专题4 易错题目重组卷(辽宁卷)(已下线)模块六 专题13 易错题目重组卷(吉林卷)云南省曲靖市第二中学2023届高三二模预测数学试题
解题方法
5 . 已知
,
,
,
是半径为
的球面上四点,
,
分别为
的中点,
,
,则以
为直径的球的最小表面积为_______________ ;若
,
,
,
不共面,则四面体
的体积的最大值为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.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/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7bae5203f4b4acf23779114b3466e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05c72a108e1bf853d347ca9ee5fcef74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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6 . 空间中由若干平面多边形所圈成的封闭的立体叫做多面体,这些平面多边形称为多面体的面,这些多边形的边和顶点分别称为多面体的棱和顶点.我们称一个多面体为凸多面体,当且仅当该多面体全部位于其每一面所决定的平面的同一侧.例如:四面体平行六面体、棱锥、棱柱、棱台都是凸多面体.设多面体
恰有100条棱.
(1)当
为凸多面体时,求最大整数
,使得存在某个平面恰与
的
条棱相交.
(2)当
为非凸多面体时,证明:
(i)存在
和平面
使得
恰与
的98条棱相交.
(ii)不存在
和平面
使得
与
的100条棱均相交.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(i)存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(ii)不存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
您最近一年使用:0次
7 . 设四面体
的六条棱长分别为
,
,…,
,体积为
,四个面的面积分别为
,
,
,
,面
与面
所成的内二面角为
,
,
,
,
为任意四个正实数,
为空间里任意一点.下列不等式对任意满足
均为锐角的四面体恒成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495fbf56b3023539b59f7bcee29acc70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da4cd81500bdb43118150dbdb1541e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f30f56664446f32dbbc2c5f12a99374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c5af132246f75fe1b62992d2047906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b039055a68e5aac79e1f24c1be4957bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4156bbe9f7e9bd7030e496773e14cc87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365b38a7689a8eede6820cd6f1fe952b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc9b603bcf4770372d679c675abb0cfd.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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8 . 两个集合
和
之间若存在一一对应关系,则称
和
等势,记为
.例如:若
为正整数集,
为正偶数集,则
,因为可构造一一映射
.下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c4704f64d12d5a12d7470eb02dc2c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c4704f64d12d5a12d7470eb02dc2c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d63694528f708717928d3431ad0f0893.png)
A.两个有限集合等势的充分必要条件是这两个集合的元素个数相同 |
B.对三个无限集合![]() ![]() ![]() ![]() ![]() ![]() |
C.正整数集与正实数集等势 |
D.在空间直角坐标系中,若![]() ![]() ![]() ![]() ![]() |
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19-20高二下·上海浦东新·阶段练习
名校
解题方法
9 . 正四棱锥
的底面正方形边长是3,
是在底面上的射影,
,
是
上的一点,过
且与
、
都平行的截面为五边形
.
![](https://img.xkw.com/dksih/QBM/2020/5/4/2455313146961920/2455679765872641/STEM/99c63537a094425cac0803ac5f8d88c6.png?resizew=157)
(1)在图中作出截面
,并写出作图过程;
(2)求该截面面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f091d853ef8f4133dfa73d7b9622cee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f48aa3096fb3db24874b1c6701a6ed.png)
![](https://img.xkw.com/dksih/QBM/2020/5/4/2455313146961920/2455679765872641/STEM/99c63537a094425cac0803ac5f8d88c6.png?resizew=157)
(1)在图中作出截面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f48aa3096fb3db24874b1c6701a6ed.png)
(2)求该截面面积的最大值.
您最近一年使用:0次
2020-05-04更新
|
1293次组卷
|
6卷引用:上海市华东师范大学第二附属中学2019-2020学年高二下学期(4月)月考数学试题
(已下线)上海市华东师范大学第二附属中学2019-2020学年高二下学期(4月)月考数学试题2020届上海市高三高考压轴卷数学试题(已下线)重难点05 空间向量与立体几何-2021年高考数学【热点·重点·难点】专练(上海专用)(已下线)专题5.8 期末考前选做30题(解答题压轴版)-2020-2021学年高二数学下学期期末专项复习(沪教版)(已下线)第09讲 空间几何体的结构与直观图(核心考点讲与练)(1)(已下线)第四章 立体几何解题通法 专题一 降维法 微点1 降维法(一)【基础版】
名校
解题方法
10 . 以棱长为
的正四面体中心点
为球心,以
为半径的球面与正四面体的表面相交得到若干个圆(或圆弧)的总长度的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
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3卷引用:湖南省长沙市第一中学2019-2020学年高三下学期第八次月考文科数学试题
湖南省长沙市第一中学2019-2020学年高三下学期第八次月考文科数学试题湖南省长沙一中2020届高三(下)月考数学(文科)试题(八)(已下线)重难点 03 立体几何-2021年高考数学(文)【热点·重点·难点】专练