画法几何中的一种求解方法——直径圆周角法

A Diameter - Circumferential-Angle Method for Solving the Problems in Descriptive Geometry

文中以实例的形式,对画法几何中的定位、距离及角度等综合性强的典型实例,尤其是对看似用一般方法(除投影变换以外的方法)难以解决的一些实例,对其进行空间常规解题分析,并给出空间解题模型,而后给出利用直径圆周角法的空间解题模型及图解方法,比较结果表明,直径圆周角法作图简单。

Taking some typical and comprehensive problems as examples in the descriptive geometry, such as location, distance and angle, etc., the space analysis.anti space model for problem solving are given using conventional method. Meanwhile a new method called ＂Diameter-Circumferential-Angle Method＂ is used to solve same kind of problems, and the space analysis and space model are also given. After comparing the process of problem solving for both methods, it is shown that the latter is simple and more easy for use.