关于内切圆的计算或证明,是解三角形中较为重要而又困难的问题之一。学生在初中学习解三角形时还没有直接遇到这一方面的问题,在高中阶段也只是偶尔碰到些零散的习题,头脑中尚未形成较完整的知识。因此,在总复习时有必要进行全面、系统的整理。下面谈谈自已在这方面的教学尝试,以供参考。 The calculation or proof of an inscribed circle is one of the more important and difficult problems in solving triangles. Students have not encountered this problem directly in the middle school when they learned to solve the triangle. At the high school stage, they only occasionally encountered some scattered exercises, and no complete knowledge has been formed in the mind. Therefore, it is necessary to carry out comprehensive and systematic collation during the overall review. Here to talk about their own teaching in this area for reference.