noun
dodecagon
doh-DEK-uh-gon
Dodecagon (noun) means a flat shape with twelve straight sides and twelve angles. Example: “The stop sign is an octagon, not a dodecagon.”
noun
1
A flat shape with twelve straight sides and twelve angles.
"The stop sign is an octagon, not a dodecagon."
"She drew a dodecagon with twelve equal sides for the maths project."
"A clock face can be divided into a dodecagon by joining the hour marks."
How to use dodecagon
Learner’s notesIn plain EnglishA dodecagon is simply a twelve-sided shape.
When to use it
It is a technical geometry term, mostly used in maths and design contexts.
Memory tip
Remember that dodeca- means twelve, the same root found in words like dodecahedron for a twelve-faced solid.
Trace the full origin ↓
Easily confused with
Common pairings
a regular dodecagon
the sides of a dodecagon
a dodecagon shape
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The stop sign is an octagon, not a _____.
Etymology
The word combines the prefix dodeca-, meaning twelve, with the suffix -gon, meaning angle or corner, both from Greek roots used to build shape names in geometry.
Synonyms
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12-gon
duodecagon
Rhymes for dodecagon
See all rhymes for dodecagon →Frequently asked questions
How many sides does a dodecagon have?
A dodecagon has twelve sides and twelve angles.
Is a dodecagon the same as a 12-gon?
Yes, 12-gon and duodecagon are both other names for the same shape.
Is a dodecagon a regular shape?
A dodecagon can be regular, with all sides and angles equal, or irregular, with sides and angles of different sizes.
What is the meaning of dodecagon?
"dodecagon" (noun) means a flat shape with twelve straight sides and twelve angles.
