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高三数学一轮复习-立体几何专题

  • 2026-10-02 23:36:49
高三数学一轮复习-立体几何专题

高三数学一轮复习· 立体几何专题

例题精析与阶梯训练(2019—2026 高考真题全编)

项目

说明

取材范围

2019—2026 高考真题34道,按六大考点编排,每道例题后配一道改编变式

例题来源

34 道高考真题全收录,每题后配真题改编【变式】

练习题

16 道新高考考点变式题,按 A/B/C 三层难度编排(A 层 6题、B 层6题、C 层 4 题)

适用对象

高三一轮复习(基础过关阶段),也可作高二预复习

建议用时

精讲4课时 + 练习 3课时 + 讲评3课时

一、考情定位

新高考立体几何一般占约 22 分:客观题 2—3 道(小题重体积、外接球、位置关系判断)+ 解答题 1 道(重空间向量法:证明平行垂直、求线面角与二面角)。2019—2026 年真题的载体分布:

年份·卷别

题位·题型

考查内容

2026 新Ⅰ

多选 + 解答

空间位置关系与二面角概念;直三棱柱平行证明、线面角与距离

2026 新Ⅱ

单选 + 填空 + 解答

棱台体积;四点共球求截面三角形面积;三棱锥垂直证明与线面角

2025 新Ⅰ

多选 + 解答

正三棱柱位置关系;四棱锥面面垂直、外接球、异面角

2025 新Ⅱ

填空 + 解答

圆柱内装双球;图形翻折中的平行证明与二面角

2024 新Ⅰ

单选 + 解答

圆柱与圆锥侧面积;四棱锥平行证明、由二面角求参

2024 新Ⅱ

单选 + 解答

正三棱台线面角;翻折:垂直证明与二面角

2023 新Ⅰ

多选 + 填空 + 解答

正方体容纳问题;正四棱台体积;由二面角求棱长

2023 新Ⅱ

多选 + 填空 + 解答

圆锥综合;截得棱台体积;三棱锥垂直证明与二面角

2022 甲卷理

单选 + 解答

长方体线面角;会圆术;圆锥展开;四棱锥垂直与线面角

2022 甲卷文

解答

包装盒(正四棱柱与四棱锥组合体)体积

2021 甲卷

填空 + 解答

圆锥侧面积;直三棱柱体积、垂直证明(理:二面角最值)

2020 甲卷

填空 + 解答

圆锥内切球;长方体垂直证明与二面角

2019 甲卷

单选 + 填空 + 解答

位置关系判断;3D 打印体积;平面图形折起

二、考点—真题映射

考点

高考考法

典型题源

对应例题

考点一体积与表面积

柱锥台的体积、侧面积与截面

2026 新Ⅱ、2024 新Ⅰ、2023 新Ⅰ/Ⅱ、2022 甲理、2021 甲文、2020 甲文

例 1—例 8

考点二球的切接

外接球心位置、容器装球、共球截面

2026 新Ⅱ、2025 新Ⅰ/Ⅱ

例 9—例 11

考点三组合体与实际应用

包装盒、会圆术、3D 打印

2022 甲文、2022 甲理、2019 甲文

例 12—例 14

考点四位置关系判断与证明

平行与垂直的判断、证明及计算

2026 新Ⅰ/Ⅱ、2025 新Ⅰ、2023 新Ⅰ、2022 甲理、2021 甲、2020 甲、2019 甲

例 15—例 24

考点五空间角

线面角、二面角、异面角;由角求参

2025 新Ⅱ、2024 新Ⅰ/Ⅱ、2023 新Ⅰ/Ⅱ、2022 甲理、2021 甲理、2020 甲理

例 25—例 32

考点六翻折与折起

折叠不变量、折起后的角与面积

2019 甲文/理

例 33—例 34

丢分自查清单

1. 台体体积公式忘带 S1S2 项,或把梯形中位线公式错用到台体(例 1)。

 2. 台体问题没有先「还原本体」:小锥高 : 大锥高 = 上底边长 : 下底边长,相似比先定高(例 5)。

 3. 外接球问题硬套模型而不定球心:球心由「到各顶点等距」的方程组确定,位置可能在面上、棱上甚至形外(例 10)。

4. 容器装球忽略「球心收缩」:水平最大间距 2(R容器−r)、竖直 h−2r,用勾股定理列切线方程(例 11)。

 5. 翻折问题把折痕两侧的点混为一谈:先标出「不变量」(沿折痕坐标、到折痕距离),再让翻折部分绕轴旋转(例 25、27、33)。

6. 由二面角求参后不回代检验:法向量夹角只给 | cos |,150° 与 30° 要回代确认(例 28)。

7. 建系前不证三线两两垂直;求出法向量后不化简、不检验与平面内向量垂直——向量法的两个规范动作缺一不可。

需要word文档请点击链接:高三一轮复习-立体几何专题_例题精析与阶梯训练1.docx

高三一轮复习-立体几何专题_例题精析与阶梯训练1.docx

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  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000628s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000377s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000355s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000599s ]
  6. SELECT * FROM `set` [ RunTime:0.000326s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000614s ]
  8. SELECT * FROM `article` WHERE `id` = 518810 LIMIT 1 [ RunTime:0.000441s ]
  9. UPDATE `article` SET `lasttime` = 1790994166 WHERE `id` = 518810 [ RunTime:0.001158s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000352s ]
  11. SELECT * FROM `article` WHERE `id` < 518810 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000410s ]
  12. SELECT * FROM `article` WHERE `id` > 518810 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000390s ]
  13. SELECT * FROM `article` WHERE `id` < 518810 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000505s ]
  14. SELECT * FROM `article` WHERE `id` < 518810 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000813s ]
  15. SELECT * FROM `article` WHERE `id` < 518810 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001031s ]
0.087754s