Question

a hectagon had 3 equal angle each of a angle 120 degree and other 4 angle are equal find the size of equal angle

Answer 1

sum of the angles of hectagon = 7=900 degree
120+120+120+x+x+x+x = 900  given
360 + 4x    = 900
4x  = 900-360
4x =   540
  x  =  540 / 4
  x  =  135 degree