近年来,中考题中出现了一类关于“外切的两圆内切于某些几何图形的新颖题”.这类试题不仅综合性强,而且涉及的知识面广,因而对九年级学生来说有相当大的难度,为攻克难点,寻找解法规律,现以部分中考题为例,分类归纳介绍如下,供九年级师生教与学时参考.一、内切于直角三角形的两个圆例1如图1,已知Rt△ABC中,∠ACB=90°,AC= In recent years, there have been a type of examination questions on the “Extinction of two circles inscribed in certain geometric shapes of new questions. ” Such questions are not only comprehensive, but also involves a wide range of knowledge, which nine grades Students have considerable difficulty, to overcome the difficulties, to find the law of solution, is now part of the exam questions, for example, classified as follows, for the ninth grade teachers and students to teach and learn when reference. Circle Example 1 As shown in Figure 1, it is known that Rt △ ABC, ∠ ACB = 90 °, AC =