Ancient Greek
Paragraph 39
Theon Smyrnaeus, De utilitate mathematicae 39
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τῶν δὲ τετραγώνων ἡ μὲν γένεσις, ὡς εἶπον, ἐκ τῶν περισσῶν ἀλλήλοις ἐπισυντιθεμένων, τουτέστι τῶν ἀπὸ μονάδος δυάδι ἀλλήλων ὑπερεχόντων· ἓν γὰρ καὶ γ΄ δ΄, καὶ δ΄ καὶ ε΄ θ΄, καὶ θ΄ καὶ ζ΄ ιϛ΄, καὶ ιϛ΄ καὶ θ΄ κε΄.