垂径定理是有关圆的知识中比较重要的一个定理 ,对圆的有关计算或证明起着非常重要的作用 .它的应用主要集中在“垂直”和“平分”两个方面 ,其中 ,涉及“平分”方面的题目可能更多一些 .因此 ,本文主要从“平分”的角度谈一下该定理的应用 .1　平分弧当题设中给出“平分弧”条 The vertical trail theorem is a relatively important theorem about the knowledge of the circle, and plays a very important role in the calculation or certification of the circle. Its application mainly focuses on the “vertical” and “dividing” aspects, which involve “ The topic of ”equalization“ may be more. Therefore, this paper mainly discusses the application of this theorem from the perspective of ”equal division“.1 Bifurcation arc gives ”Bisection arc" when the title is set.