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近几年各地初中数学竞赛试题,都涉及到三角形形状的判定,因为这类问题条件隐藏,灵活性强,所以解答此类问题时,要有敏锐的观察力和想象力,同时还需具有扎实的基本功,能综合运用多方面知识,根据不同题目的特点采用不同的方法来确定三角形的边角关系。本文举例说明三角形形状判定的常用方法,供同学们参考。
In recent years, the examination questions of the junior high school mathematics competitions all involve the determination of triangular shapes. Because these kinds of problems are hidden and flexible, it is necessary to have a keen observation and imagination when answering such questions. The basic skills can use a variety of knowledge in a comprehensive way and use different methods to determine the relationship between the corners of the triangle according to the characteristics of different topics. This article gives an example of the common methods used to determine the shape of triangles for reference by students.