Circumference and Area of a Circle The circumference of a circle is the distance arc length, s, is the distance C = 2= = 2( = 107 = 31.4 units .3.14 is an approximation for T. . (C) 360 60 MAB = 360 (31.4) = 52 units the entire circle, while two points on the circle. S 60 B 5 The arc length is as long as the entire circumference because the arc represents of the circle.