空间图形的平行、垂直、距离、夹角问题是立体几何解决的主要问题。常规的立体几何方法主要依据定理和概念、借助各种几何图形的不同变化、利用逻辑推理对空间图形的性质进行研究,一些复杂的题型解题时常常需要找到准确的切入点,通常需要构造辅助线、辅助面转化为平面几何问题。这些问题的本身常具有技巧性和随机性,对学生要 Space graphics parallel, vertical, distance, angle problem is the main problem of solid geometry. Conventional three-dimensional geometric methods are mainly based on the theorems and concepts, with the help of different variations of various geometrical figures, and using the logical reasoning to study the properties of the spatial figures. Some complex questions usually need to find accurate entry points when solving problems, and usually need to construct Auxiliary line, auxiliary surface into a plane geometry problems. The questions themselves are often tricky and random, for students