阅读了《中小学数学》(初中版)2011年第10期《对这样的证法学生更易理解》一文(以下简称“文[1]”),文[1]从投影法、旋转法和代数计算法三方面进行研究,深受启发,其实怎样构造?为何这样构造!一直以来都是几何教学的重点与难点,为教师所关注、学生所关心.面对“中点”如何“构造”值得探究,在研究 Read the article “Mathematics for Primary and Secondary Schools” (Junior High School Edition), Issue 10, 2011, “It is easier to understand this type of certificate student” (hereinafter referred to as “text [1]”), [1] from projection, rotation The study of algebraic calculations in three aspects is deeply enlightened. In fact, how to construct it and why it is so constructed has always been the focus and difficulty of geometry teaching. It is concerned with the teachers and what the students care about. How to deal with the “point” “Structure” is worth exploring, in research