ιδ΄.
ΒΖ, Β∠. οὐκοῦν ταπεινοτάτη ἐστὶν ἡ Β∠ ὥστε καὶ τὸ ∠. ὥστε καὶ τὸ μὲν Γ∠ ταπεινότερον φαίνεται τοῦ ΛΖ, τὸ δὲ ΛΖ τοῦ ΚΝ.
Opticorum recensio Theonis. Euclid. ed. Johan Ludvig Heiberg, ed. Heinrich Menge. United States. 2018.
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