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257-gon
[de] 257-Eck
[el] 257-γωνο
[es] 257-gono
[eu] 257-gono
[fi] 257-kulmio
[it] 257-gono
[ja] 二百五十七角形
[ko] 이백오십칠각형
[lt] Taisyklingasis 257-kampis
[nl] Tweehonderdzevenenvijftighoek