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Cloakedninjas · Answer 1 · 2019-07-26T09:41:21+0000

If you know the radius RR of the circle that inscribes a regular polygon having nnsides, the side of the regular polygon can be easily found with trigonometry.

The polygon is composed by nn identical triangles having a common vertex in the center of this circle, therefore this angle is 2π/n.

Simbu · Answer 2 · 2019-07-30T01:59:12+0000

If it is a regular octagon, all sides are of equal length, so multiply the length of one side by 8 to get the perimeter. For an irregular octagon add together the length of each of the eight sides to get the perimeter.

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