Mathematics in Ancient and Medieval India c6.s2.15

c6.s2.15

( b ) *Geometrical compass* – In one instance, the instrumental device given by Āpastamba ( *Śulba* 9.¹. ) can be compared with modern geometrical compass in a limited sense. Three holes were made in a bamboo rod of desired length, two of these were made at its two ends and the third at the middle. By attaching the bamboo rod through a hole at its end or at the middle to a peg fixed on a ground and by moving its free end or ends, circles of two different radii can be constructed.