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近年来从各省市中考试题来看,有关圆的两解问题经常出现.这类题目重在考查同学们对基础知识的掌握与运用情况,要正确解决这些问题,就必须应用分情况讨论的思想方法,这有利于培养学生严谨的逻辑思维能力.如果解题时考虑不严密,形成思维定势,就会漏解.现就圆中常见的两解问题归类解析,供大家参考.一、点与圆的位置不确定时,会有两解问题例1在同一平面内,点P到圆O的最长
In recent years, from the provinces and cities in the examination questions, the round of the two problems often appear.This kind of problem focuses on the students to grasp the basic knowledge and use of the situation, to correctly solve these problems, we must apply the situation to discuss the idea Method, which is conducive to cultivating students rigorous logical thinking ability .If not consider the problem-solving, the formation of mindset, it will leak. Now the round of the common solution to the problem of classification analysis for your reference .A, Point and the location of the circle is uncertain, there will be two solutions Problem 1 in the same plane, the point P to the longest round O