Explanation

The sum of the interior angles of a polygon is given by:

(n - 2) × 180

where n is the number of sides.

For a 5-sided polygon (pentagon):

(5 - 2) × 180 = 3 × 180 = 540

Since it's a regular polygon, all interior angles are equal. To find each angle:

540 ÷ 5 = 108°