教学目标理解并掌握矩形的判定方法;会用矩形的判定定理进行有关的论证或计算.教学重点、难点重点:掌握矩形的判定方法及证明过程.难点:矩形判定方法的证明以及应用.教学过程一、复习引入1.复习提问.矩形的定义是什么?(有一个角是直角的平行四边形是矩形.板书定义)强调矩形的定义是判定矩形的一种方法.此时要分析命题的题设和结论,题设的两个条件 Teaching objectives to understand and grasp the method of determining the rectangle; will use the theory of the judgment of the rectangle to carry out the relevant argument or calculation Teaching emphasis, difficult points: master the method of determining the rectangle and the proof process Difficulties: the method of proof and application of rectangular teaching. First, the review introduced 1. Review questions. What is the definition of a rectangle? (A corner is a rectangular parallelogram is a rectangular.) Definition of the book emphasizes the definition of the rectangle is a method of determining the rectangle. And conclusion, set the two conditions