高考复习作为一项特殊的教学活动,它要求教师引导学生将所学到的知识、技能和方法形成牢固的、有机的整体,使学生的认知结构得到完善,思维能力有所提高。求二面角的平面角在较多考试特别在高考中是经常出现的。由于学生对这类题目具体作法缺乏正确理解,特别是二面角的平面角不能作出,对于所给图形的线面之间、面面之间的关系认识不够,往往造成失误,下面就二面角的平面角问题具体作法 As a special teaching activity, college entrance examination review requires teachers to guide students to form a solid and organic whole of learned knowledge, skills and methods so as to improve their cognitive structure and improve their thinking ability. Find the dihedral angle of the plane in more exams, especially in college entrance examination is often the case. Due to the lack of a correct understanding of the concrete practice of such topics by students, especially the flat angle of the dihedral can not be made, there is not enough understanding of the relationship between the lines and surfaces of the given graphics, which often leads to mistakes. Angle of the plane angle problem specific practices