Pi is one of the best-known and most-studied numbers in all of mathematics. Although first measured by geometers in ancient times, it permeates all branches of mathematics and is used to test computers as they compute pi’s value to trillions of digits. This class will review some of the surprising places pi shows up as a way of introducing complex mathematical topics in a simple and informative way. Class participants will learn about the history of pi and be introduced to some of the greatest mathematicians, including the legendary Ramanujan.