You draw a circle. From that circle, you can determine both the circumference and the radius. Then the value of pi would be the circumference divided by twice the radius. Simple, right?

Washington State University Dr. Universe: What is pi? – Johsan, 10, Alabama Dear Johsan, One of my favorite holidays is Pi Day. On March 14, people who love the math constant called pi celebrate ...

National Pi Day is held each year on March 14. It honors 3.14 the ratio of the circumference of a circle. You can also get deals on food too.