Interior angles 178 so exterior angles 2.
Number of sides of any regular polygon = 360/exterior angle
You polygon has 180 sides. Bet you're glad you didn't have to sketch it!
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A regular polygon is a polygon with congruent sides and interior angles.
15 sides
It will have 24 sides
72
The sum of the interior angles of any regular polygon of n sides is equal to 180(n - 2) degrees. 6660 degrees.