论文部分内容阅读
角是数学中的重要概念．从小学开始认识角,到了初中阶段又进一步认识了角．但是,是否结合不同阶段的学习内容,在图形的运动变化过程中去认识角呢?角的运动变化过程中会出现怎样的情况,又有那些不变的性质呢?我们从课本中一个熟悉的问题入手, 通过图形的运动变化,展示一个角从锐角、钝角、平角到周角甚至到大于周角的角的变化过程,同时在这个运动变化过程中,去认识几何图形在运动变化中的不变量．
Corner is an important concept in mathematics. From the beginning of elementary school to understand the angle, to the junior high school and further understanding of the horn. However, do you combine the learning content of different stages to understand the angles in the process of the changes in the movement of the figures? What happens when the movement of the angle changes, and what are the unchanging qualities? We are familiar from the textbooks. Starting from the problem, through the movement of the graphics, the process of changing the angle of an angle from an acute angle, an obtuse angle, a flat angle to a peripheral angle, or even to a larger angle than the peripheral angle is shown. At the same time, in the course of this movement change, the geometry is not recognized in the change of motion. variable.