To find the measure of every interior angle of a regular hexagon, first, we need to find the sum of the internal angles of a hexagon.
1. To find that, we need to use the following formula:
![\text{ Sum of Interior angles of a polygon}=180(n-2)](https://img.qammunity.org/2023/formulas/mathematics/college/4h4z4of27nkgf9sggorg7gm70donts081o.png)
Where n is the number of sides of a polygon. Since a hexagon has 6 sides, then n = 6, and we have:
![180(6-2)=180(4)=720^(\circ)](https://img.qammunity.org/2023/formulas/mathematics/college/feoe6wn722r6ttxfmu4xsakiyeyw697k6n.png)
Then the sum of the interior angles of a hexagon is 720 degrees.
2. Now, to find the measure of each interior angle of a regular hexagon, we need to apply the next formula:
![\text{ Each interior angle of a regular polygon=}(180(n-2))/(n)](https://img.qammunity.org/2023/formulas/mathematics/college/1w4suexi9q2gw0wyeqwm1ieou8tyjdhim7.png)
And then, for n = 6 (regular hexagon), we have:
![(720^(\circ))/(6)=120^(\circ)](https://img.qammunity.org/2023/formulas/mathematics/college/35gyc4otc534zbrc0ape4a0sfn47jupoh5.png)
Therefore, in summary, the measure of every interior angle of a regular hexagon is 120° (120 degrees).