Answer: An arc can be measured either in degree or in unit length. A
arc is a portion of the circumference of the circle which is
determined by the size of its corresponding central angle.
Step-by-step explanation:
create a proportion that compares the arc to the whole circle first
in degree measure and then in unit length.
(measure of central angle/360 degrees) = (arc
length/circumference) arc length = (measure of central angle/360
degrees)(circumference)
