# De utilitate mathematicae 24

Theon Smyrnaeus, De utilitate mathematicae, Paragraph 24. Ancient Greek.

Canonical: https://interlinea.aeterna-institute.org/library/greek/theon-smyrnaeus/de-utilitate-mathematicae/24

τετράγωνοί εἰσιν οἱ ἐκ τῶν κατὰ τὸ ἑξῆς περισσῶν ἐπισυντιθεμένων ἀλλήλοις γεννώμενοι. οἷον ἐκκείσθω- σαν ἐφεξῆς περισσοὶ αʹ γʹ εʹ ζ θʹ ια ἓν καὶ γʹ δʹ, ὅς ἐστι τετράγωνος, ἰσάκις γάρ ἐστιν ἴσος, τουτέστι δὶς βʹ δʹ δʹ καὶ εʹ θʹ, ὸς καὶ αὐτὸς τετράγωνος· ἔστι γὰρ τρὶς γʹ θʹ· θʹκαὶ ζ ιϛ΄, ὃς καὶ αὐτὸς τετράγωνός ἐστι· τετράκις γὰρ δ ιςʹ ιςʹ καὶ θʹ κε΄, ὃς καὶ αὐτὸς τετράγωνός ἐστι καὶ ἰσάκις ἴσος· ἔστι γὰρ πεντάκις εʹ κε΄· καὶ μέχρις ἀπείρου ὁ αὐτὸς λόγος. κατὰ μὲν οὖν ἐπισύνθεσιν οὕτως γεννῶν- ται οἱ τετράγωνοι, τῶν ἐφεξῆς περισσῶν τῷ γεννωμένῳ ἀπὸ μονάδος τετραγώνῳ προστιθεμένων· κατὰ πολλαπλα- σιασμιὸν δέ, ἐπειδὰν ὁστισοῦν ἀριθμὸς ἐφʼ ἑαυτὸνπολλα- πλασιασθῇ, οἷον δὶς βʹ δʹ, τρὶς γʹ θʹ, τετράκις δʹ ιϛ΄.

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Theon Smyrnaeus, De utilitate mathematicae, ed. Eduardus Hiller. Text: The Greek Library, from the Perseus Digital Library and other open sources, CC BY-SA 4.0. Changes: apostrophes normalised and the text divided into reading sections by Interlinea.
License: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). Source: https://thegreeklibrary.pages.lisn.upsaclay.fr/works/tlg1724.tlg001.local001/.