The line CD meets the y -axis at C . Y -intercept is AC . The y -intercept of this line is a , at C . Since the distance AB is b , the point P represents the required nth partion. SaRD is much more simple to construct geometrically.
SaRD gives the student insight as to why it works.
SaRD is not an iterative procedure, unlike GLaD . SaRD reminds one of Euclid's own construction. SaRD can also handle multiples.