初中平面几何证明题大体可分为线段之间的度量关系证明与角之间的度量关系证明。在线段之间的度量关系的证明中,有很多题都是证两线段相等,本人把自己在教学中常用的方法归纳了一下,认为证两线段相等主要有以下一些方法常用: 一、证其为等腰三角形两底角的对边例1 已知:如图1,在△ABC中,∠ACB= The junior high school plane geometry proving can be roughly divided into the proof of the metric relationship between the line segments and the proof of the metric relationship between the angles. There are many questions in the proof of the metric relationship between the online segments. They are equivalent to the two lines. I summed up the methods commonly used in teaching. I believe that there are several methods commonly used to verify the equality of two lines: The opposite side of the two base corners of the isosceles triangle is known as: Figure 1, in △ ABC, ∠ ACB =