Where does “пятидесятиугольник” come from?

пятидесятиугольник (Russian) comes from Russian пятьдесят, from Russian де́сять, from Old Church Slavonic десѧть, from Proto-Slavic desętь, from Proto-Balto-Slavic *déśimt, from Proto-Indo-European déḱm̥t — ten.

пятидесятиугольник (Russian): pentacontagon

Definitions

  1. pentacontagon

Ancestry of “пятидесятиугольник”, step by step

пятидесятиугольник traces back through two separate lines of ancestry.

via Russian пятьдесят

StepLanguageWordMeaning
1Russianпятьдесятfifty
2Russianде́сятьten
3Old Church Slavonicдесѧтьten
4Proto-Slavicdesętьten
5Proto-Balto-Slavic*déśimtten
6Proto-Indo-Europeandéḱm̥tten

via Russian у́гол

StepLanguageWordMeaning
1Russianу́голangle; corner
2Proto-Slavicǫgъlъcorner, angle
3Proto-Balto-Slavic*ángulas
4Proto-Indo-Europeanh₂engulosjoint?
5Proto-Indo-Europeanh₂eng-curve, bend
Every word from Proto-Indo-European déḱm̥tEvery word from Proto-Balto-Slavic *déśimtEvery word from Proto-Slavic desętь
пятидесятиугольник — Etymology, Origin & Word History | Etymology Explorer