Abstract
When all the edges of a solid are congruent, the figure is known as a regular polyhedron. This paper describes on relation to a projective method using several values obtained geometrically in case of five regular polyhedrons. It is also shown that the properties are estimated by the comparison between a length of edge and radii of inscribed or circumscribed circles on base polygon and other polygon at plan, whose required values may be measured.
Hence, each height of the vertexes for elevationcan be drawn without rotating of polygon as usual.The tables show the numerical values together withthe drawings displayed by using the values, i.e.the sphere of inscribed and circumscribed in aregular polyhedron and so on.
