Each exterior angle of a regular polygon is 120° less than each of its interior angle. How many sides does the polygon have?

12 sides

Step-by-step explanation:

let interior angle = x

x + (x-120) = 180

x+x-120=180

2x-120=180

2x=180+120

x=300/2

x=150

exterior angle=150-120

=30

no. of side = s

no. of side = 30*s=360

=s=360/3

=12