Final answer:
A polygon with a sum of interior angles of 3960 degrees has 24 sides.
Step-by-step explanation:
A polygon is a closed plane figure with straight sides. The sum of the interior angles of a polygon can be found using the formula: (n-2) * 180 degrees, where n is the number of sides of the polygon. In this case, we can set up the equation as (n-2) * 180 = 3960. To solve for n, we divide both sides by 180: n-2 = 22. Adding 2 to both sides gives us the solution: n = 24.