The custom-made wheel of the bike is designed to look like a regulation dartboard. Every white-colored portion is not filled with the material to allow the flow of air. The outermost circle is divided into twenty congruent sections. What is the measure of each arc in this circle? The designed bike is a 29-inch bike (with a diameter of the outer circle = 24.5 in and the diameter of the fully inflated wheel after installation = 29.15in.) What is the arc length of each arc described above? What is the total area that allows airflow (white-colored areas?)
