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Regular polygons

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Geometry (2d) index
Regular polygons diagram
Regular hexagons, septagons, octagons, etc, may have their properties calculated by dividing them into equal triangles and analyzing these by trigonometry.
Side length
Number of sides

Area is
Corner-center distance
Side-center distance
Perimeter length
Angle α
Angle β
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This calc only works for convex regular polygons, i.e. where all sides and angles are equal. For more complex shapes, it is necessary to divide them into many triangles and anlyze these separately.