大家已经认识了长方形、正方形、三角形等平面图形,这些图形如果沿着一条边旋转会形成什么图形呢?体积又该如何求呢?可能你觉得这些问题很简单,没有必要研究,可是聪聪和笨笨却非常感兴趣,而且有许多新的发现,下面就让我们一起走进故事吧! We have seen the rectangular, square, triangle and other plane graphics, these graphics if one along the edge of the rotation will form what graphics? Volume and how to do it? Perhaps you think these problems are very simple, there is no need to study, but Cong Cong and Stupid but very interested, and there are many new discoveries, let’s go into the story below!