河南省1997年中招考试数学试题的第六题是一道平面几何证明题．此题证法灵活多样，思路广阔，不怕不怪，难度适当，不失为考查学生的逻辑思维和论证能力、综合运用所学知识分析和解决问题能力的一道难得的几何佳题．此题从多角度分析，可得到多种征明方法，下面给出几种证法， Henan Province in 1997 to move the sixth test math test questions is a proof of plane geometry. This method is flexible and diversified. It has a wide range of thinking. It is not afraid to blame, and it is not too difficult. It is a rare geometric problem that examines students' ability of logical thinking and argumentation, and comprehensively uses their knowledge to analyze and solve problems. This question from a multi-angle analysis, can get a variety of methods of explication, the following is given several kinds of law,