Dodecagon

A dodecagon or 12-gon is a shape with 12 sides and 12 corners.

Regular dodecagon

All sides of a regular dodecagon are the same length. Each corner is 150°. All corners added together equal 1800°.

The amount of space a regular dodecagon takes up is

\begin{matrix} A & = 3 \cot (\frac{π}{12}) a^{2} = 3 (2 + \sqrt{3}) a^{2} \\ \approx 11, 19615 a^{2} . \end{matrix}

The variable A represents the area, and the variable a represents the apothem.

The perimeter of a regular dodecagon is

$\begin{matrix} P = 12 s \end{matrix}$

The variable P represents the perimeter, and the variable s represents one side.Template:Math-stub Template:Polygons