Answer:
48, 60 and 72 degrees
Explanation:
The first angle can be found by doing 180 - 120 = 60 as interior and exterior angles sum to 180.
The sum of the remaining 2 angles is 120, and since they are in the ratio 2:3, the angles are 2/5(120) = 48 and 3/5(120) = 72 degrees.