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Approximation of pi using inscribed polygons

Approximation of pi using inscribed polygons. Archimedes determined that the true value of pi lies between 3.1408 and 3.1428, a remarkable achievement for a man living over 2,200 years ago. His method used polygons inscribed in a circle. Here you can envision some of what he did by seeing the areas of inscribed polygons approach the area of the circle as the number of sides increases. - credit to Guillermo Bautista and his website mathandmultimedia.com