ΚΑΟ ἴση. ἀλλʼ ἡ ὑπὸ ΡΑΒ τῇ ὑπὸ ΖΑΚ ἴση ἐστίν· κατὰ κορυφὴν γάρ· καὶ ἡ ὑπὸ ΟΑΚ ἄρα ἴση τῇ ὑπὸ ΚΑΖ.
Scholia in Euclidis catoptrica (scholia vetera). Scholia in Euclidem. ed. Johan Ludvig Heiberg, ed. H. Menge. United States. 2018.
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