Question

The three angles in a triangle are in the ratio 3:4:5. Find the angles

Answer 1

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