An Extension. of Hexagram Method for Perspective Drawing

In general, a section in a solid is similar to its perspective drawing which is a true shape of the section in case that the section is parallel to picture plane. We make a cube containing the solid in drawing its perspective and then establish a section triangle in the cube. At that time we can draw perspective of points in the solid with three edges of the triangle as measuring lines. This paper explains the basis for this perspective drawing method in the case of a cube, analyses some conditions for establishment of a section triangle and presents its table.