13. The relationship between the sum of the measures of the interior angles of a polygon, S, and the number of sides of the polygon, n, is given by the equation S = 180(n - 2). The sum of the interior angle measures of a certain polygon is 1,440°. How many sides does this polygon have？

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

It is known that the formula S=180(n-2), and S=1440, after substituting it, the solution is n=10.