Calculations of Pi

Archimedes approximation, 287-212 B.C. Frenchman Viéta, 1540-1603 Irishman Lord Brouncker, (Viéta’s peer) English mathematician Wallis Leibniz’s Formula

p

Reference: “Calculus and Analytic Geometry”, Fifth Edition, Thomas/Finney, Addison Wesley, March 1980.