pentadecagon
2 synonyms for pentadecagon, grouped by meaning and by how common each one is.
Noun — A shape with fifteen straight sides and fifteen angles.
Synonyms
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
15-gon
quindecagon
How to use pentadecagon
The word patterns that sound natural to a native speaker.
a regular pentadecagon
draw a pentadecagon
the sides of a pentadecagon
It is a specialist geometry term rather than everyday vocabulary.
Etymology
The word joins the prefix pentadeca-, meaning fifteen, to the suffix -gon, meaning angle or corner, the same ending found in words like hexagon and octagon.
Full origin of pentadecagon →Frequently asked questions
What is a pentadecagon?
It is a polygon with fifteen sides, so it also has fifteen interior angles.
Is pentadecagon the same as quindecagon?
Yes, quindecagon and 15-gon are alternative names for the same fifteen-sided shape.
Where does the word pentadecagon come from?
It comes from the Greek-derived elements pentadeca- (fifteen) and -gon (angle), the standard pattern used for naming polygons.
