Distance from centre of regular polygon to midpoint of side. Used for area calculation of regular shapes.

How do I find area of irregular polygon?

Divide into triangles, calculate each, sum. Or use shoelace formula if coordinates known.

What's Heron's formula?

For triangle with sides a,b,c: A = √(s(s−a)(s−b)(s−c)) where s = (a+b+c)/2. No height needed.

Matematica

Number of sides (n)

Side Length (s)

Mathematically verified

Reviewed October 2026

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