Let AB be any line of the length required for the distance between the points of Earth and Fire. Bisect AB in 0 and from 0 draw OH perpendicular to AB. Cut off OC to equal AR
Join B with C and produce the line BC to F making FC to equal OA. From centre B, with radius BF, draw the circle FDK, cutting OH at D. D is then the ‘Spirit’ angle of the Pentagram. With the centres B and D draw circles with a radius equal to AB, and they cut each other at E which will be the Water angle. In a similar way a circle of radius AB from centre Al find 0 the Air angle. Join A, B, D, E, and 0 in the usual way.
R. A. Gilbert