Question: what is the difference between arc measure and arc length for a minor arc?
Answer: The measure (sometimes called the degree measure) of an arc is equal to the measure of the central angle that intercepts that arc. In the figure above, both ∠AOB and arc AB have measures of 90°. Both ∠COE and arc CDE have measures of 180°. ... An arc with measure less than 180° is a minor arc.