一道经典几何命题的多种证明与推广

Different Demonstration and Generalization of a Classical Geometric Proposition

本文通过研究,给出一道经典几何命题——蝴蝶定理的六种证法。同时,利用射影变换知识,易将此命题进行系列衍变推广。

The authors give a classical butterfly theorem. Meanwhile, authors point geometric proposition and 6 demonstration methods of out that the geometric proposition is easy development and generalization by using projective change knowledge.