The sum of the angles of two supplementary angles is 180. one angle measures 15 more than twice the measure of the other. find the measure of each angle.
angle a + angle b = 180 a = 2b + 15 3b + 15 = 180 3b = 180 - 15 = 165 b = 165 divided by 3 = 55 the ratio of the two angle is 2:1 as a is twice as much as b a is 55 x 2 + 15 = 125 b is 55 125 + 55 = 180
