Definition:Dodecagon

Definition

A dodecagon is a polygon with exactly $12$ sides.

Regular Dodecagon

A regular dodecagon is a dodecagon which is both equilateral and equiangular.

That is, a regular polygon with $12$ sides.

That is, a dodecagon in which all the sides are the same length, and all the vertices have the same angle:

Linguistic Note

The word dodecagon derives from the Greek dodeka, meaning twelve, and gon, deriving from the Greek for corner.

Sources

• 1989: Ephraim J. Borowski and Jonathan M. Borwein: Dictionary of Mathematics ... (previous) ... (next): dodecagon
• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): dodecagon
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): dodecagon
• 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): dodecagon
• 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): polygon
• 2021: Richard Earl and James Nicholson: The Concise Oxford Dictionary of Mathematics (6th ed.) ... (previous) ... (next): polygon