1)fundamental polygon,基本多角形2)Triangle basic frame,三角形基本框架3)Multiscale Fundamental Forms,多尺度基本形式4)the basic figure of similar triangles,相似三角形的基本图形5)polygon,多形，多角形6)fundamental inequality of triangle,三角形基本不等式
用法和例句
This paper established two triangle inequalities containing angular parameter and the fundamental inequality of triangle was strengthened.