在进行北师大版实验教材八年级(下)“探索三角形相似的条件的判定方法《两角对应相等的两个三角形相似》的教学时(这是本章节的教学难点),许多教师都是按照书上的设计进行的。即两个学生一组,其 In the teaching of Grade 8 (below) of the Beijing Normal University experimental textbook, the method for determining the similar conditions for the exploration of the triangle, ”The two triangles are similar to each other, is similar to the two triangles," which is a difficult teaching point in this chapter. Many teachers are It is based on the design of the book, that is, a group of two students.