The angles are 45° 60° and 75°
Elaboration：
Let the three angles be 3x 4x and 5x
( since the sum of interior angles of triangle=180° )
3x+4x+5x= 180
12x = 180
x = 15
3x= 45
4x= 60
5x= 75
Answer: 3p = 1/2
( p + p + p ) = 1/2
Y(3y-4)
The y can be factored out of both equations
