本研究采用人教版教材,其中“平行四边形”一章安排在“勾股定理”一章之后。为了引导学生从整体上回顾总结三角形的研究经验,采用整体复习三角形的方法,而不是仅仅复习勾股定理及其逆定理。具体复习方案为:复习1课时,练习巩固1课时,习题课1课时(用三角形研究经验研究一个内角等于另一个内角2倍的三角形)。基本设计思想:重视几何图形研究的一般活动经验的总结和应用,通过复习三角形,总结出三角形的研究思路、研究内容、研究方法,把这 This study adopts the teaching materials of the People’s Education Press, in which the “parallelogram” chapter is arranged after the “Pythagorean Theorem” chapter. In order to guide students in reviewing and summarizing the research experience of the triangle as a whole, a method of reviewing triangles as a whole is used instead of merely reviewing the Pythagorean theorem and its inverse theorem. The specific review plan is: review 1 class, practice consolidation of 1 class hour, and 1 class of study class (triangle research experience to study a triangle with an internal angle equal to 2 times the other internal angle). Basic design ideas: Emphasis on the summarization and application of general activity experience in geometry research. After reviewing triangles, summarize the research ideas, research contents, and research methods of triangles.