本文从立体几何中三大问题：垂直、二面角、体积用向量方法解决的简捷性出发，探讨向量引入中学立体几何的必要性。
Vector method can solve the three main problems of solid geometry-vertical , dihedral angle and solid directly and simply . Based on this fact , this article discusses the necessity of introducing vector into solid geometry .
几何三大问题