Answer:
30°, 60°, 90°
Step-by-step explanation:
Assume the first angle = x°
That means the second angle is 2x° and the third is 3x°.
A triangle's interior angles adds up to 180°
We can create an equation
x + 2x + 3x = 180
6x = 180
x = 30
The first angle is 30°, the second is two time the first so 60°, and the third one is three times the first so 90°.