Why is there a special day for Pi, the ratio of a circle's circumference (distance around the circle) to its diameter (distance across the circle)? What makes Pi so special?
The objective of this website is to convince the world that mathematics is fun and bring attention to mathematicians’ favorite number, Pi. Learn about Pi, watch some videos and see some Pi in action.
You've probably used Pi in basic geometry, but it actually has so many more uses than you might think! In honor of Pi Day, join Hank Green for a dive into the irrational and never ending world of Pi!
Numberphile did something crazy - attempted to calculate Pi using real Pies. Watch and see how close they got to the real figure of 3.14159265359. Related Lesson
Did you know that we've known the number of pi for over 4,000 years? Or that the number represented by pi has infinite numerals? This video explains how pi is connected to the study of music, financial models, and even the density of the universe. Related Lesson
