What is the measure of each interior angle of a regular hexagon? 

Correct option is B

Given:​

Regular hexagon with 6 sides 

Formula Used: ​

For each angle of polygon with side n;

Each interior angle = $$\frac{180(n-2)}{n}$$ 

Solution:​

Hexagon has 6 side, 

So , 

Interior angle = $$\frac{180(6-2)}{6} = 120\degree$$​​