A dodecagon is a 12-sided polygon. Several special types of dodecagons are illustrated above. In particular, a dodecagon with vertices equally spaced around a circle and with all sides the same length is a regular polygon known as a regular dodecagon.
Dodecagon
See also
Polygon, Regular Dodecagon Explore this topic in the MathWorld classroomExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Dodecagon." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Dodecagon.html