立体几何在讲完多面体和旋转体后,侧面积和体积公式很多,学生往往不注意总结规律,于是就死记硬背,效果不好。其实,只要掌握这些公式的特点,辨明它们之间的联系和区别,尽管公式繁多,也是可以记牢的;就是一时忘记了,推导一下也还是容易的。根据这个想法,我在教学中通过下面的公式系统表,揭示公式的特点和相互联系,对帮助学生理解和记忆公式收到了较好的效果: After three-dimensional geometry has finished polyhedron and rotating body, the side area and volume formulas are many. Students often do not pay attention to summarizing the laws, so they memorize the results in a bad manner. In fact, as long as you master the characteristics of these formulas, and identify the connections and differences between them, you can remember them despite the many formulas; forget about them at once, and it is still easy to deduce them. According to this idea, I used the following formula system table in the teaching to reveal the characteristics and interrelationships of formulas. It has achieved good results in helping students understand and memorize formulas: