The formula for sum of the interior angles is, S = 180 x (n - 2) and that of the number of diagonals is, d = n x (n - 3) / 2 where n is the number of sides. For 6-sided polygon, S = 180 x ( 6 - 2) = 720 d = 6 x (6 - 3) / 2 = 9 Therefore, the answer is 720 degrees and 9 diagonals.
