Regular Polygons Calculator


Three online calculators to calculate side, area, radius of inscribed circle and radius of circumscribed circle of regular polygons.

Let a be the side of a regular polygon, n the number of sides, r the radius of the inscribed circle and R the radius of the circumscribed circle.

Calculator 1 - Given side a and number n, find r, R and the area.

Enter a and n the number of sides of the polygon and press "enter". The outputs are: r radius of inscribed circle, R radius of circumscribed circle and the area of the polygon.

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Calculator 2 - Given r and number n of sides, find side a and the area of the polygon.

Enter r and n press "enter". The outputs are: a , R radius of circumscribed circle and area of the polygon.

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Calculator 3 - Given R and number n of sides, find a, r and the area.

Enter R and n and press "enter". The outputs are: a, r radius of inscribed circle and the area of the polygon.

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