In math, things that are a repeating decimal or stand for something are given a Greek letter to represent it. The ratio of the circumference to the radius of a circle is 3.141592654... It was the...
It is exactly pi2. Any other way you express it would be inexact. Pi, or any number that includes pi (like pi x 2, pi + 1, pi2, etc.) are irrational numbers - they can't be expressed as a fraction,...