numero triangolare angolul

Olasz	Angol
numero triangolare noun {m}	triangular number(an integer which is the sum of n natural numbers) noun [UK: traɪ.ˈæŋ.ɡjʊ.lə(r) ˈnʌm.bə(r)] [US: traˈjæŋ.ɡjə.lər ˈnʌm.br̩]

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