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