Quick answer
A dodecagon is a polygon with 12 sides.
- Main formula
- Regular perimeter = 12 x side; regular area = (perimeter x apothem)/2.
- Quick example
- If each side measures 4, the perimeter is 48.
Definition
A dodecagon is a closed polygon formed by 12 line segments.
Regular dodecagon
In a regular dodecagon, all sides and all interior angles are equal.
Formulas
- Perimeter of a regular dodecagon: P = 12s.
- Area of a regular dodecagon: A = (P x a)/2, where a is the apothem.
Example
If a regular dodecagon has side length 4, then P = 12 x 4 = 48.