Question: how do you calculate the perimeter of a sector?
Answer: Let's start with Step 1. If you know that the arc is one-fourth of the circle, then you can multiply the perimeter by 1/4 (or divide by 4) to get the arc length. For example, if a sector is 1/4 of a 500 perimeter, then the arc of the sector is 500 / 4, or 125.