Question 1003132
An octagon has two equal angles each 120° and all the remaining six angles are equal. Find the measure of each of the six angles. 
 Angle sum  of octagon  will be =(n-2)x180=(8-2)x180=6x180 degree 
as per given conditions  two angles are 120 degree each and other six angles are equal . let six equal angle are X
six angle will be 6x
120+120+ 6 X =6x180
240+6X = 1080
6X=1080-240=840
X=840/6=140 degree 
answer 140 degree