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?
Original measure a / 360 * pi * d a = arc measurement in degrees d = diameter
now increase a * 1.20 / 360 * pi * d * 1.35
ratio of increase to original
1.2 * 1.35 / 1 * 1 = 1.62 this is a 62 % increase