Respuesta :
Each Interior Angle = 180 -(360 / # sides)
120 = 180 - (360 / # sides)
(360 / # sides) = 60
# sides = 360 / 60
# sides = 6
120 = 180 - (360 / # sides)
(360 / # sides) = 60
# sides = 360 / 60
# sides = 6