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for a regular polygon with N sides, sum of all angles equals (180°) * (N - 2)

example: triangle (N = 3): (180°) * (3 - 2) = 180°

square (N=4): (180°) * (4 - 2) = 360°

To find each angle, divide by number of sides: triangle: 180° / 3 = 60°

square: 360° / 4 = 90°

So for a regular 30-gon (N=30): (180°) * (30 - 2) = 5040° (sum of all angles)

and 5040° / 30 = 168° (each angle)

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Q: What is the measure of one angle of a regular convex 30-gon?
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