Question

Find unknown sizes of the angles:

Answer 1

Answer:

Step-by-step explanation:

Exterior angle of triangle = 360'

3x + 2x + 4x = 360'

9x = 360'

x = 360' / 9

x = 40'

therefore , 2x = 80'

                 3x = 120'

                 4x = 160'