# Scholia in opticorum recensionem Theonis (scholia vetera) 58

Scholia in Euclidem, Scholia in opticorum recensionem Theonis (scholia vetera), Section 58. Ancient Greek.

Canonical: https://interlinea.aeterna-institute.org/library/greek/scholia-in-euclidem/scholia-in-opticorum-recensionem-theonis-scholia-vetera/58

58. Ἐπεὶ γὰρ αἱ τρεῖς ἴσαι εἰσὶν αἱ ∠Κ, ΚΖ, ΚΒ, ὁ ἄρα κέντρῳ τῷ Κ, διαστήματι δὲ τῷ Κ∠ κύκλος γραφόμενος ἥξει καὶ διὰ τῶν Β, Ζ. ὥστε ὀρθὴ ἡ ὑπὸ ∠ΒΖ· ἐν ἡμικυκλίῳ γάρ.

---

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/.