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【教学课件】一次函数与三角形面积专题复习课

  • 2026-04-07 17:48:39
【教学课件】一次函数与三角形面积专题复习课

一次函数与三角形面积专题复习课

牛海容（赵桂芳名师工作室A组）

作者简介

牛海容，中共党员，辽宁省沈阳市南昌长白岛中学教师，沈阳市教学新秀，第十四届初中青年数学教师课例展示活动“最优秀选手”，曾获教育部基础教育精品课、辽宁省作业设计一等奖、沈阳市优秀课特等奖等荣誉，参与国家中小学课程资源建设活动。

作品简介

本作品是北师大版八年级上册数学第四章一次函数与三角形面积专题复习课教学课件，聚焦一次函数与几何图形面积结合的核心考点，以知识铺垫为起点，回顾待定系数法、一次函数与坐标轴交点求法等必备知识，筑牢解题根基；通过典例精析分层突破，基础层讲解三角形一边在坐标轴或与坐标轴平行时的面积计算，提升层通过割补或平行线的性质化斜为直，实现等积转化，攻克复杂图形面积计算难点；设置拓展挑战环节，强化知识综合应用与思维拓展。贯穿数形结合、转化思想两大核心数学思想，衔接点坐标、一次函数表达式、直线交点与图形面积的内在关联，助力学生掌握一次函数与三角形面积的解题策略，提升几何与代数综合应用素养。

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  1. CONNECT:[ UseTime:0.000897s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001338s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.011366s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.004482s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001391s ]
  6. SELECT * FROM `set` [ RunTime:0.000655s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001440s ]
  8. SELECT * FROM `article` WHERE `id` = 490785 LIMIT 1 [ RunTime:0.001099s ]
  9. UPDATE `article` SET `lasttime` = 1775566620 WHERE `id` = 490785 [ RunTime:0.011870s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000348s ]
  11. SELECT * FROM `article` WHERE `id` < 490785 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000495s ]
  12. SELECT * FROM `article` WHERE `id` > 490785 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000385s ]
  13. SELECT * FROM `article` WHERE `id` < 490785 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000631s ]
  14. SELECT * FROM `article` WHERE `id` < 490785 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000643s ]
  15. SELECT * FROM `article` WHERE `id` < 490785 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000891s ]
0.113886s