The interior angles would ad to (9 - 2)*180 = 7*180 = 1260 degrees.
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To find the sum of the interior angels of the formula (n-2)*180 is used. The 'n' represents the number of sides. The sum of he interior angles of a nine sided polygon would be (9-2)*180=1260.
1,260 Complete this formula 180(n-2) n is for the number of sides in the polygon.
A 9 sided polygon is a nonagon Its exterior angles add up to 360 degrees Its interior angles add up to 1260 degrees --------------------------------------------------------- Also the sides of a nine sided figure can not be sold separately.
It is a nonagon.
nonagon