If the degree measure of an arc of a circle is increased by 20% and the radius of the circle is increased by 35%, by what percent does the length of the arc increase?
62 % increase
Let the original radius = r
Let the degree measure of the arc = θ
arc length = r * θ
New arc length = (1.20)r * ( 1.35 θ) = 1.62 r θ = 62% increase (as EP found)
