Leila, we know that the three angles together equal 180 degrees, so if one is 90 (being a right triangle), then the other two must add up to 90.
If x = the measure of the smaller, then the larger is 2x, right?
x + 2x = 90
3x = 90
x = 30
The smaller is 30 and the larger is 60.
Hope this helps!
Leila R.
03/20/16