Definition

1. Noun:
   • A twelve-sided polygon: A flat, closed geometric figure with exactly twelve straight sides and twelve angles.

Usage

• The word "dodecagon" is a specific geometric term used in mathematics, design, and architecture to describe a shape with twelve sides.
• It is a countable noun. You can have one dodecagon or multiple dodecagons.
• It is typically used in formal or technical contexts.

Examples

• Noun:
  • The architect designed a beautiful courtyard in the shape of a dodecagon.
  • A regular dodecagon has sides of equal length and internal angles of 150 degrees each.

Advanced Usage

• "Regular dodecagon": A dodecagon where all sides are of equal length and all interior angles are equal (each 150°).
  • The tiling pattern was based on a regular dodecagon and a square.
• "Irregular dodecagon": A twelve-sided polygon where the sides and angles are not all equal.
  • The plot of land was an irregular dodecagon, making it difficult to survey.

Variants and Related Words

• Dodecagonal (adj): Having the form of a dodecagon; twelve-sided.
  • The room featured a dodecagonal ceiling.

Synonyms

• Twelve-sided polygon: The descriptive phrase synonymous with "dodecagon."
• 12-gon: An informal, abbreviated term used in some mathematical contexts.

Related Terms (Not Phrasal Verbs or Idioms)

• Polygon: The general category of shapes to which a dodecagon belongs.
• Decagon: A ten-sided polygon.
• Dodecahedron: A three-dimensional solid with twelve flat faces, often confused with the two-dimensional dodecagon.

Noun

1. a twelve-sided polygon