Answer:
First: 72
Second: 24
Third: 84
Step-by-step explanation:
Let's say that the second angle, the smallest one, is x. Using the provided information, we can make the equation 180=3x+x+x+60, or 180=5x+60. To solve for the second angle, first subtract 60 from each side (120=5x) and then divide each side by five (24=x). Now, to find the first angle, we multiply the second by three (3*24=72). To find the third, add 60 to the second (24+60=84).