45 degrees
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The exterior angle of a n-gon is 360/n degrees. So for a heptagon, the exterior angle is 360/7 = 51.429 degrees.
All of the exterior angles of any polygon all add up to 360 degrees. If the n-gon is regular, then each of them is 360/n .
Exterior angle of ANY regular n-sided polygon is 360/n degrees...
remember this formula for the number of sides = n sum of internal angles of a regular polygon = [2x(n-2)x90 degree] each interior angle of a regular polygon = [2x(n-2)x90 degree]/n each exterior angle of a regular polygon = 360 degree/n for your question: each exterior angle of a 15 sided regular polygon = 360 degree/15 = 24 degree
90 degrees. Exterior angle of any regular n-sided polygon is 360/n degrees