# Scholia in opticorum recensionem Theonis (scholia vetera) 9

Scholia in Euclidem, Scholia in opticorum recensionem Theonis (scholia vetera), Section 9. Ancient Greek.

Canonical: https://interlinea.aeterna-institute.org/library/greek/scholia-in-euclidem/scholia-in-opticorum-recensionem-theonis-scholia-vetera/9

9. Μὴ θορυβείτω γὰρ ἡμᾶς τοῦτο, ὅπως τὸ μὲν ΒΓ∠ τρίγωνον ἐπὶ πλέον ἠνέῳκται κατὰ πλάτος, τὸ δὲ ΒΚ Λ στενώτερόν ἐστι. πρῶτον μὲν γὰρ τοῦ στοιχειωτοῦ ζητοῦντος ἴσα καὶ παράλληλα νοεῖν τὰ φαινόμενα, εἴπερ τὸ ΒΚ Λ τρίγωνον κατὰ πάντα ἐφήρμοζε τῷ ΒΓ∠ τριγώνῳ, οὐκ ἂν ἦσαν δύο, ἀλλʼ ὡς ἓν ἐφαίνοντο ἀλλʼ οὐδὲ παράλληλα· νῦν δʼ οὕτως, ὡς ἔχει, τεθέντων συμβαίνει τὴν ἔκθεσιν ἐφαρμόζειν αὐτοῖς· καὶ γὰρ παράλληλά τέ εἰσι τὰ τρίγωνα, καὶ τὸ ΒΚΛ τρίγωνον πλεονεκτεῖ τῷ μήκει τῶν ΒΚ, ΒΛ γραμμῶν, καί ἐστι διὰ ταῦτα ἴσον τὸ ἕτερ

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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/.