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在本刊9月号中,我曾就有关高一几何相似形章的第一单元线段度量的教学法作了讨论。本文将继续讨论这个单元中有关相似三角形的概念与其判别定理的教学法。关于相似三角形的概念与其判别定理的教学,可以说是相似形章里的一个主要内容,一般说来、这一单元的教学是不十分困难的。但是要使这些教材组织得更加严密,与旧知识有更好的联系,使学生徹底地比较巩固地掌握这些知识,并且充分发挥每个教学过程中应有的思想性,有些问题还是值得提出来加以讨论的。
In the September issue of this issue, I discussed the pedagogical approach to the measurement of the first unit line segment of the geometry of similar high school. This article will continue to discuss the teaching of the concept of a similar triangle and its discriminant theorem in this unit. The teaching of the concept of a similar triangle and its discriminant theorem can be said to be a major part of a similar form. In general, the teaching of this unit is not very difficult. However, these teaching materials must be organized more closely and have better connection with old knowledge so that students can master these knowledge thoroughly and thoroughly, and give full play to the ideological nature of each teaching process. Some problems are worth proposing. discussed.