1. I was mostly famous for the first theoretical calculation of pi, which I estimated between 3, 10/71, 31/7 and 223/71.

2.  Pi is the key constant in any question that involves circular or harmonic motion. It is one of the most essential relationship in maths.

3. In the world of math, and in everyday life, pi is used to calculate many useful quantities. By using pi, you can calculate: -the circumference (perimeter) of a circle. -The diameter of a circle. -The area of a circle. -The volume of a circle. Pi in every day life