No because the closest polygon sum is 1620 which is the hendecagon the eleven sided polygon
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If this 9 sided polygon is a regular polygon, then the sum of its angles is:(n - 2)180 degrees = (9 - 2)180 degrees = 7 x 180 degrees = 1,260 degrees.
Sum of exterior angles = 360 degrees Sum of interior angles = 1440 degrees
If each angle measures 90 degrees the polygon is a square and so its angles sum to 360 degrees.
360 degrees
The sum of the interior angles of any regular polygon of n sides is equal to 180(n - 2) degrees. 6660 degrees.