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If each exterior angle is 9 degrees then it is a regular 40 sided polygon.
6 degrees if it's a regular polygon
Recall that the measurement of interior angle is: 180°(n - 2)/n Given that a regular polygon has 6 sides, let n = 6. Then: 180°(6 - 2) / 6 = 180° * 4 / 6 = 120° Since the total measurement of interior and exterior angles is 180°, 180° - 120° = 60°, which is the measurement of the exterior angle of the regular polygon.
For any n-sided regular polygon the exterior angles are 360/n degrees.
With a regular polygon: 360/exterior angle = number of sides