Blind Date: Math Pi and e

Video Description: Math humor, Math Pi and e are on a date -- but one of them has a chilling secret! Watch more hilarious videos at Olde English.

Pi or π is one of the most important mathematical constants, approximately equal to 3.14159. It represents the ratio of any circle's circumference to its diameter in Euclidean geometry, which is the same as the ratio of a circle's area to the square of its radius. Many other formulas from mathematics, science, and engineering include π. It is an irrational number, which means that its decimal expansion never ends or repeats.

The mathematical constant e is the unique real number such that the value of the derivative (slope of the tangent line) of f(x) = e^x at the point x = 0 is exactly 1. The function e^x so defined is called the exponential function, and its inverse is the natural logarithm, or logarithm to base e.

See also: Thank God it’s Pi day, Video: Pi Day, Blind Date: Math Pi and e, Archimedes: 3.14159 is Close Enough, Euler Formula: e, Pi. i, 0, 1, This is Pi