-gon
suffixEtymology From Ancient Greek γωνία (gōnía, “corner, angle”), from Proto-Indo-European *ǵónu (“knee”).
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Geometry, Mathematics, Sciences Morpheme Forms the names of plane figures containing a given number of internal angles, and thus bounded by that number of line segments (polygons).
- A pentagon has five sides.
- a 17-gon
- Related terms
- -gonal