Pi Day: Google Doodle Celebrates Math Nerds Everywhere

For most of the world, today is March 14, or 3/14. To most, that date doesn’t have any special meaning. But to us math nerds, it means only one thing: today is Pi Day! Thankfully, it looks like Google has no shortage of number nerds, because the search giant is marking the occasion with a spiffy new logo filled with some of choice geometry formulas.π (Pi) is the mathematical constant that has helped school children and mathematics professors determine the circumference of a circle based on its diameter for centuries. The constant starts with 3.14 and continues forever (as it is an irrational number). Many math geeks celebrate the famous math constant (and mathematics in general) on every 14th of March because that date represents the first three digits of Pi.Google’s new logo, which you can see on the top right, contains not only the famous πr2 formula, but five other uses of π: measuring the volume of a sphere (V = 4⁄3 πr3), computing the circumference of a circle (C = 2πr), measuring the volume of a cylinder (V = πr2h), Archimedes’ calculation of Pi (223/71