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Mathematics

Regular Polygon Calculator

Variable Legend

n= number of sidess= side lengtha= apothemR= circumradius (center to vertex)

Area

Using side length directly.

Perimeter

n sides of length s.

Interior and exterior angles

Interior
Exterior

Circumradius (vertex)

Radius of the circumscribed circle.

Apothem (inscribed circle radius)

Radius of the inscribed circle.

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Pro Tip

Always verify your input values before calculating. For regular polygon, small input errors can compound and significantly affect the final result.

Difficulty:Intermediate

Did you know?

Regular hexagons tile perfectly with no gaps; found throughout nature (honeycombs). The mathematical principles underlying regular polygon have evolved over centuries of scientific inquiry and practical application. Today these calculations are used across industries ranging from engineering and finance to healthcare and environmental science, demonstrating the enduring power of quantitative analysis.

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Reviewed May 2026
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