Question: how to find the perimeter of sector?
Answer: l = In other words, l is. of the circumference of the circle, which will give us the length of the arc. = 2r + Perimeter of the sector = 2 times radius plus arc length. = 2r + = 2 x 4 + x 2 x 3.14 x 4. Perimeter = 2r + = 2 x 7.2 + x 2 x 3.14 x 7.2.