do NOT explain much, that the value of Negative 2 (-2) is such, or even that the number 1 is not just a tad more than 1. After all, we thought that a circle had a perimeter thrice the diameter length, when it is a recurring decimal: 3.14159... When we calculate perimeter, area, or any other cubic units... especially relating to a circle, unless we use a calculator, our computing with pen and paper is different unless all working these problems/calculations agree to use a specific calculator! We... Sign in to see full entry.