Classical geometryC = 2 \pi r = \pi d\!where C is the circumference of a circle, r is the radius and d is the diameter.A = \pi r^2\!where A is the area of a circle and r is the radius.V = {4 \over 3}\ ...
The following is a list of significant formulae involving the mathematical constant π. The list contains only formulae whose significance is established either in the article on the formula itself, t ...
