Answer:
20°, 60°, 100°
Step-by-step explanation:
Let x = measure of angle 1
3x = measure of angle 2
5x = measure of angle 3
Since the sum of the measures of the angles of a triangle is 180,
then x + 3x + 5x = 180
9x = 180
x = 20
3x = 3(20) = 60
5x = 5(20) = 100
Check: 20:60:100 = 1:3:5 and 20 + 60 + 100 = 180
