摘要
本文给出了图解空间直线与平面、平面与平面角度问题的一种方法，该法可使作图过程简化。
In this paper, a simple and convenient method of diagramming space-angle matter in space line and plane, plane and other one was presented.This method is knew well and makes diagram-process be simplified.
关键词
直角三角形法
坐标差
投影变换
right triangle method
coordinate difference
projective variation
