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笔者听了一堂“探索三角形可以被分割成两个等腰三角形的条件”的初三数学复习课.课后听执教老师说,这是她在外地听的一堂展示课,现在原封不动地上了一次,目的就是探讨这样一个问题,这节课能否通过再设计变得完美一些.这节课的上课实录大致如下:一、尝试引入第一个环节拿出一个三角形,并出示问题1:如果要分割成两个等腰三角形可以吗?众生答:原三角形
The author listens to the first three math class “exploring the conditions under which triangles can be divided into two isosceles triangles.” After class listening to the coaching teacher said that this is a show class she was listening to in the field and is now intact On the ground, the purpose is to explore such a question, the class can be redesigned to become more perfect. Class lesson record is as follows: First, try to introduce the first link to come up with a triangle, and produce the problem 1 : If you want to split into two isosceles triangles can be? Beauties answer: the original triangle