To find arc length multiply the total circumference of a circle by the the fraction of the total circle that defines the arc with the length for which you are solving. Rounded to 3 significant figures the arc length is 628cm. The formula to calculate the arc length is.
Frac texttheta 360 times pitext d texttheta is the angle of the sector and text d is the.
Arc length 2prth360 where th indicates the central angle of the arc in degrees. The formula to measure the length of the arc is. If the central angle is radians then arc length formula is simpler. Text Arc length.