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A Brief History of Ï. Pi has been known for almost 4000 yearsâbut even if we calculated the number of seconds in those 4000 years and calculated pi to that number of places, we would still only be approximating its actual value. Hereâs a brief history of finding pi:he ancient Babylonians calculated the area of a circle by taking 3 times the square of its radius, which gave a value of pi = 3. One Babylonian tablet (ca. 1900â1680 BC) indicates a value of 3.125 for pi, which is a closer approximation.
The Joy of Pi D Blatner, 1997, is a fun book which will appeal to school students and upward. Petr Beckmann's A History of Pi, 1976, St Martins Press. is a classic, quirky, fun book on Pi and its calculation, with odd and interesting snippets from its history. However, there are errors in one or two of the formulae.