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OpenStudy (anonymous):
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OpenStudy (anonymous):
OpenStudy (ranga):
The external angles of all polygons add up to 360 degrees. An octagon has 8 sides and therefore 8 equal external angles that add to 360 degrees. Each external angle = 360 / 8 = 45 degrees. Internal angle = 180 - 45 = 135 degrees. Equate 4x + 12 to 135 and solve for x.
OpenStudy (anonymous):
The answer is 30.75? :D @ranga
OpenStudy (ranga):
yes.
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