Answer:hexagon
Step-by-step explanation:
Each interior angle=120
Each interior angle in a polygon=180(n-2)/n
120=180(n-2)/n
Cross multiply
120n=180(n-2)
120n=180n-360
Collect like terms
180n-120n=360
60n=360
Divide both sides by 60
60n/60=360/60
n=6
the polygon has 6 sides which means that it is an hexagon
