Meet π’s cousin, φ

So what’s that symbol, you ask? It’s the Greek letter Phi (pronounced FEE). We’ve all heard of the (in)famous π, or 3.14159265358… Our math teachers pounded this into our heads every year, and the nerds would always hold competitions to see who could recite the most digits of pi. So far, computers have sputtered out over 5 trillion digits of …