Question

exterior angle of triangle measures 120° and its interior opposite angles are in ratio 7:5, find angles of triangle​

Answer 1

Angle A + Angle B = 120°

A : B = 7 : 5

Let A = 7x and B = 5x

7x + 5x = 120°

12x = 120°

x = 120° / 12

x = 10

So, 7x = 70°

5x = 50°