96-Sided Polygon inscribed perimeter = 3.1410 circumscribed perimeter = 3.1427 actual value of [pi] = 3.1416. Note: All figures rounded off to four decimal places. Contemplating ...

By 150 CE, Ptolemy had the value of pi at 3.1416, which he may have done using the Archimedean method. Archimedes used ...

Archimedes, through some further clever geometry, figured out how to estimate the perimeters for polygons with twice as many sides. He went from a 6-sided polygon, to a 12-sided polygon, to a 24 ...

This interactive feature illustrates Archimedes' basic approach to calculating pi. It finds an approximation by determining the length of the perimeter of a polygon inscribed within a circle and ...