What is a dodecagon?

A dodecagon is a polygon with 12 sides and 12 angles. The sum of the interior angles of a dodecagon is 1800 degrees. Each angle in a regular dodecagon measures 150 degrees. A dodecagon can be constructed by extending the sides of a regular decagon, resulting in a shape with 12 sides of equal length. The perimeter of a dodecagon can be calculated by multiplying the length of one side by 12. The area of a regular dodecagon can be calculated using the formula: A = (3 × √3 × s^2) / 2, where s is the length of one side.