3.1415926535897932384626433

let x = 0.999...

10x = 9.99...

10x - x = 9.99... - 0.999...

9x = 9

x = 1

0.999... = 1

pi is not exactly 22/7 omg!

phi is pronounced as fy, as in defy

phi^2 = phi + 1