Around 250 B.C., the Greek mathematician Archimedes calculated the ratio of a circle's circumference to its diameter. A precise determination of pi, as we know this ratio today, had long been of ...

The polygon is such that the inscribed circle has radius 1. We’ll keep using the angle from the x-axis as the function’s input, instead of the distance along the shape’s boundary.

Approximating Pi. By Rick Groleau; Posted 09.01.03; NOVA; Around 250 B.C., the Greek mathematician Archimedes calculated the ratio of a circle's circumference to its diameter.