# Scholia in opticorum recensionem Theonis (scholia vetera) 17

Scholia in Euclidem, Scholia in opticorum recensionem Theonis (scholia vetera), Section 17. Ancient Greek.

Canonical: https://interlinea.aeterna-institute.org/library/greek/scholia-in-euclidem/scholia-in-opticorum-recensionem-theonis-scholia-vetera/17

17. Διὰ τὸ τὴν ΛΓ ὑποτείνειν καὶ τὴν Μ μείζονα οὖσαν καὶ τῆς ΛΚ τῆς ὑποτεινούσης τὴν Ο, ἡ δὲ μείζων πλευρὰ τὴν μείζονα γωνίαν ὑποτείνει. ἡ δὲ εἰς τὰς παραλλήλους εὐθείας ἐμπίπτουσα τὰς ἐναλλὰξ γωνίας ἴσας ἀλλήλαις ποιεῖ. Ad prop. VI.

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Scholia in Euclidem, Scholia in opticorum recensionem Theonis (scholia vetera), ed. Johan Ludvig Heiberg, H. Menge. 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/tlg5022.tlg004.local001/.