Angle Ratios

Topic:
Ratios
Change the a, b, c ratios to see how the angles change
Angle relationship given the ratios among the angle a,b,c on a straight line. Suppose the ratio a:b:c = 6:1:2 and a + b + c = 180°. What is the value of c? ( Hint: 6b + b + 2b = 180°) Answer: Use the ratio in terms of b. Since a:b:c = 6:1:2, in terms of b means that 6b + b + 2b = 180° 9b = 180° b = 20° But c = 2b c = 2 * 20° c = 40°