Answer:
Explanation:
The three angles in a triangle add up to 180 : 
If angle 1 is 90 because it is a right angle triangle then : 
Angle 2 + Angle 3 = 180 -90 
Angle 2 + Angle 3 = 90 
The ratio of Angle 2:Angle 3 is 1:2 
There are 3 shares in total (1+2=3) 
1 share = 90 ÷ 3 = 30 
So Angle 2 is 30 and angle 3 is 60 
Hope this helped and have a good day