What is the sum of interior angle of a polygon with 9 sides

Answer 1

The sum of the interior angles of a polygon can be calculated using the formula: (n-2) x 180 degrees, where n is the number of sides of the polygon.

For a polygon with 9 sides, the sum of the interior angles would be:
(9-2) x 180 = 7 x 180 = 1260 degrees

Therefore, the sum of the interior angles of a polygon with 9 sides is 1260 degrees.