Anyone who has taken a math class knows that Pi equals 3.14, or 22/7, yet not many know what this equation means or where it came from. Richard Bew gives a brief history and explanation in three minutes and fourteen seconds.
Pi is a method used for solving equations involving circles, spheres, and other shapes, usually defined as a ratio of a circle’s circumference to its diameter. Since the diameter for all circles is approximately 23 and the circumference is 72.25, those numbers divided equal 3.14. It is an irrational number, or a number with decimal places that continue infinitely in no real order. Though it’s not clear who discovered this equation, it was the Greek mathematician, Archimedes, who developed a polygonal approach to better approximate Pi. In other words, he used polygons circumscribed and inscribed around a circle.