近几年,中考试题中常常出现需要证明形为a2/b2=m/n这种题断的几何题（其中a、b、m、n一般为四条线段）.有些同学往往感到不知如何思考解答.本文结合实例,谈谈解这类问题的一般思路. In recent years, there are often geometric questions that need to be proved as a2/b2=m/n in the examination questions (where a, b, m, and n are generally four segments). Some students often feel that they do not know how to think and answer. This article combines examples to discuss the general ideas for solving such problems.