English word decagon comes from English -gon, English deca-

Dictionary entry | Language | Definition |
---|---|---|

-gon | English (eng) | (geometry) Forms the names of plane figures containing a given number of angles, and thus bounded by that number of line segments (polygons). If the number is large enough, it can be attached directly to an English numeral with a hyphen. |

deca- | English (eng) | In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10. Symbol: da. Ten. |

decagon | English (eng) | (geometry) A polygon with ten sides and ten angles. |

- Descendants of -gon
- Lemoine hexagon Tucker hexagon apeirogon bigon digon dodecagon fourgon googolgon hectagon hexagon icosihenagon isogon megagon monogon monogonal myriagon nonagon orthogon orthogonal tetragon undecagon zerogon zonogon zonogonal
- Descendants of deca-
- dakat decaborane decacarbonyl decachlorobiphenyl decacyclic decagram decahedron decahistidine decahydrate decakatal decalogy decamer decamillennial decamillionaire decangular decanormal decare decastyle decasyllabic decatetraene decathlon decillion tetradecahedron tetraphosphorus decasulfide