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由异面直线l、l′组成的图形经常涉及三个问题:一是l、l′所成的角,二是l、l′的距离,三是l、l′公垂线段的位置。由已知条件解决异面直线l、l′的上述三方面问题称为解异面直线l、l′。 本文给出了解异面直线的两种方法、一:直角四边形法;二:特征三角形法。从这些方法中可以看出异面直线的三方面问题不是彼此孤立的,而是存在着内在联系。
The graphics composed of the different straight lines l, l′ often involve three problems: one is the angle formed by l and l′, the second is the distance between l and l′, and the third is the position of the l and l′ vertical line segments. The above-mentioned three problems that solve the heterohedral lines l, l’ from known conditions are called desolver lines l, l’. This paper gives two methods to understand the straight lines of different sides. One is the rectangular quadrilateral method. The second is the characteristic triangle method. From these methods, it can be seen that the three aspects of the heterotopes are not isolated from each other, but there is an inherent connection.