在新课程改革的背景下,圆的很多繁、难、偏、旧和应用不大的内容都慢慢退出了中考的舞台.然而根据题目的本质特征,联想到圆的有关知识,恰当地构造辅助圆,往往可将问题化繁为简、化难为易,找到解题的捷径.因此在解决策略多样化,试题具有区分化的今天,辅助圆在中考中备受青睐.笔者从2016年中考试题进行分析,归纳出下列几类适合辅助圆的典型. In the context of the new curriculum reform, the circle of many complex, difficult, partial, old and less used content are slowly out of the exam in the stage.However, according to the nature of the topic, think of the circle of knowledge, the appropriate structure Auxiliary circle, the problem can often be complicated, difficult as easy to find a shortcut to solve the problem.Therefore in the diversification of strategies to solve the problem with the differentiation of today, the auxiliary circle in the senior high school entrance examination in the favor of the author from the 2016 mid-test Test questions, summed up the following types of typical auxiliary circle.