一、背景说明同学们感觉数学越来越复杂,越来越抽象,好像所学数学与生活没有一点联系。现就如何测量旗杆的高度的问题,利用我们学习过的相似三角形及它的性质的知识进行实际应用。二、教学目标知识与技能:1.通过测量旗杆的高度的活动,巩固相似三角形有关知识,积累数学活动的经验。 I. Background The students felt that mathematics became more and more complex and more and more abstract, as if the learned mathematics had no connection with life. Now on the question of how to measure the height of the flagpole, use the knowledge of the similar triangles we have learned and its nature for practical applications. Second, the teaching objectives of knowledge and skills: 1. By measuring the height of the flagpole activities, consolidate knowledge of similar triangles, and accumulate experience in mathematics activities.