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圆与圆的位置关系导学本单元主要研究圆与圆的位置关系,重点内容是两个圆不同位置关系的概念及相交、相切时的性质,这部分知识是几何综合题的命题热点.学习本单元要注意与前面所学的圆的有关知识的联系,关注重计算与推理相结合,基本定理和基本图形结合与转化,以及一些典型辅助线的作法.以两圆的知识设计的探索型试题是近年来各地中考命题趋向.——编者
The positional relationship between circle and circle This unit mainly studies the positional relationship between circle and circle. The key content is the concept of the two different positions of the circle and the nature of the intersection and tangency. This part of the knowledge is the proposition hotspot of geometric synthesis. Learning this module should pay attention to the connection with the relevant knowledge of the previous circle, focusing on the combination of recalculation and reasoning, the combination and transformation of basic theorems and basic graphs, and the practice of some typical auxiliary lines. Exploring the Design of Two Circles of Knowledge Test questions are the propositions of propositions in recent years.