We know that a regular hexagon has six equal sides.
First, we have to find the sum of all its interior angles using the following formula
[tex](n-2)\cdot180[/tex]Where n = 6.
[tex](6-2)\cdot180=4\cdot180=720[/tex]Then, we divide 720° by 6 because there are 6 interior angles.
[tex]\frac{720}{6}=120[/tex]