What Is Pi?
Pi (π) has been around for about 4,000 years. In Euclidean geometry, pi is the circumference (C) of any circle divided by the diameter (d) of the circle, thus giving us the formula π=C/d. Regardless of the circle’s size, the ratio is always pi. And because pi is an irrational number, it has no ending, meaning that it continues forever without repeating.
Here are some fun ideas for you to consider using with your students as part of your Pi Day celebration.