# Commentarius in dimensionem circuli 57

Eutocius, Commentarius in dimensionem circuli, Εἰς τὸ γ΄ θεώρημα.. Ancient Greek.

Canonical: https://interlinea.aeterna-institute.org/library/greek/eutocius/commentarius-in-dimensionem-circuli/57

Ἐπεὶ οὖν ὀρθή ἐστιν ἡ ὑπὸ ΑΒΓ, τρίτου δὲ ἡ ὑπὸ ΒΑΓ, διμοίρου ἄρα ἐστὶν ἡ ὑπὸ ΑΓΒ. Ἐὰν ἄρα προσεκβάλλοντες τὴν ΓΒ ἐπὶ τὸ Β καὶ ἴσην αὐτῇ ἀπολαβόντες ἀπὸ τοῦ Α ἐπιζεύξωμεν, ἰσόπλευρον ἔσται τὸ τρίγωνον, καὶ διὰ τὸ τὴν ΑΒ κάθετον διχοτομεῖν τὴν βάσιν διπλῆ ἐστιν ἡ ΑΓ τῆς ΓΒ. Ἐὰν οὖν πάλιν λάβωμεν τὴν ΑΓ ᾱφξ, ἔσται ἡ ΓΒ ψπ, καὶ τὸ μὲν ἀπὸ ΑΓ ἔσται Μ γχ, τὸ δὲ ἀπὸ ΓΒ Μ ηῡ. Καὶ ἐὰν ἀφέλωμεν τὸ ἀπὸ ΓΒ ἀπὸ τοῦ ἀπὸ ΑΓ, λοιπὸν καταλειφθήσεται τὸ ἀπὸ ΑΒ Μ εσ, ὧν πλευρὰ τετραγωνικὴ ᾱτνᾱ ἔγγιστα· περιττεύει γὰρ τὸ ἀπʼ αὐτῆς τοῦ ἀκριβοῦς μ ᾱ. Διό φησιν· ἐλάσσονα λόγον ἔχει ἡ ΑΒ πρὸς ΒΓ ἤπερ ᾱτνᾱ πρὸς ψπ. Οἱ δὲ πολλαπλασιασμοὶ ὑπόκεινται·

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Eutocius, Commentarius in dimensionem circuli, ed. Charles Mugler. 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/tlg4072.tlg002.local001/.