The ratio of the angle ACB to 360 degrees will be 100360 518. This is the same as the degrees version but in the degrees case the 2p360 converts the degrees to radians. There is a term arc is used with reference to the circle.
C is the central angle of the arc in radians.
Thus the length of the arc AB will be 518 of the circumference of the circle which equals 2 pr according to the formula for circumference. Th displaystyle theta equals the measurement of the arcs central angle in degrees. Arc length formula is used to calculate the measure of the distance along the curved line making. If the central angle is is radians the formula is simpler.