A treatise on the circumference that determines the parameters of successively inscribed and circumscribed polygons inside and around a circle, in order to calculate the value of Pi to 16 decimal fractional units. Kāšī's calculations are performed in sexagesimal numberation for a circle with a radius of 60. The results are expressed in sexagesimal and decimal fractions.
Manuscript Witnesses9 witnesses:
P. 270 (no. 802), M3.
9:197. There are 7 witnesses listed for this work in repositories in Mashhad, Shiraz, and Tehran.