In math Pi is a number although it's letters when you look at it.
Pi in math is a number that is approximately 3.142.
The Pi is the circumference of any circle divided by its diameter.
The number Pi is denoted by the Greek letter π - pronounced 'pie', is one of the most common constants in all of mathematics.
It is the circumference of any circle, divided by its diameter.
It can be very confusing and I could never wrap my brain around those types of math problems but some can if they have the ability to learn it.