Monte Carlo method
Calculating pi by making many random points in a square, and finding if they are inside a circle
The ratio of circle points to total points should be close to 4 pi
Simon Plouffe formula
The infinite sum of an equation that's too long to put here
Basel Problem
The infinite sum of 1/(num2)
Bailey-Borwein-Plouffe
Calculating pi with the Bailey-Borwein-Plouffe formula
Points on a circle
Combined distance between points on a circle
Leibniz series
Calculating pi with the Leibniz series