In a triangle, the measure of the first angle is three times the measure of the second angle. The measure of the third angle is 20 degrees less than the second angle. What is the measurement of each angle?
- x + y + z = 180
- 3y + y + y-20 = 180
- 5y - 20 = 180
- 5y = 180 - 20
- 5y = 200
- y = 40
x = 3 * 40 = 120 z = 40 - 20 = 20