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Octagon


 

An octagon is a polygon that has eight sides. The internal angle at each vertex of a regular octagon is 135°. The area of a regular octagon of side length a is given by

Related Topics:
Polygon - Eight - Angle - °

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:A = 2a^2 cot rac{pi}{8} = 2(1+sqrt{2})a^2 simeq 4.82843 a^2.

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