10 sides area_calculator

Dodecagon Calculator — Neon Labels

Dodecagon Calculator

Enter side length and options.

Side length

Unit

Rotate:

Show short diagonals Show long diagonals

Perimeter

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Area

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Apothem (a)

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Circumradius (R)

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Long Diagonal

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Short Diagonal

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S = —

a = —

R = —

P = —

Area = —

Formulas:
Perimeter = n × s
Area = (Perimeter × a) / 2
Apothem a = s / (2 × tan(π/n))
Circumradius R = s / (2 × sin(π/n))
Diagonal(k) = 2R × sin(kπ/n)