Math Lovers Unite!
Get it? Since pi isn't a rational (cannot be expressed by 2 integers as a fraction) number, I says to pi "Be rational". Then, pi says to i, "Get real", because i is not a real number. The square root of -1 is called i or imaginary, since there cannot be a square which is negative. When pi says to i, "Get real" he also means it sarcastically, like saying, "Get real, pi can never be expressed as 2 integers in a fraction." Some fractions that are commonly used instead of the decimal form, are: 22/7, 333/106, and 355/113. There are many fractional variations of pi, but none of them are exactly pi. For example, 355/113 = 3.14159292..., as appose to pi, which is 3.14159265358979323846264338327950... and it never stops. (thats all I can remember). Sometimes, textbooks or workbooks require you to use 22/7 as pi, when calculating measurements relating to a circle, but mostly, we use 3.14 for pi. It is not amazingly accurate, but you get close answers if you round to the nearest hundredth.