Dodecagon

polygon with 12 sides and 12 vertises

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

A dodecagon

Regular dodecagonEdit

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

AreaEdit

The amount of space a regular dodecagon takes up is

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

PerimeterEdit

The perimeter of a regular dodecagon is

 

The variable P represents the perimeter, and the variable s represents one side.