Why does Pi show up in so many diverse equations if it’s only related to a circle?

Question

Is Pi more than just a ratio for circles? Is there a easy way to understand the universality of Pi?

In: 1018

Answer 1

If we see Pi in some equations, it pretty much always means somewhere in whatever is being calculated there is a circle. It’s not always obvious how the circle is related, but there is going to be one hiding somewhere. If you have an example of a man equation you’re thinking about, people may be able to point out where the circle is.