Once you got the hang of radians we can use the arc measure formula which requires the arc length s s and the radius of the circle r r to calculate. So the arc makes up 16 of the circumference of the circle. Instead of having two formulas for the arc length of a function we are going to reduce it in part to a single formula.
The arcs length is computed in distance units such as centimetres.
Arc measure arc length radius s r a r c m e a s u r e a r c l e n g t h r a d i u s s r. So the arc makes up 16 of the circumference of the circle. Arc length Since the measure of an arc equals the measure of its central angle we can determine arc length using the ratio of the arcs central angle to 360. One radian is approximately equals to 573.