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Scholia in Euclidis optica (scholia vetera) (19)

urn:cts:greekLit:tlg5022.tlg003.1st1K-grc1:19
Refs {'start': {'reference': '19', 'human_reference': 'Section 19'}}
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19. Πρὸς ὀρθὰς γωνίας ἴσαι p. 12, 18 εἰ γάρ τις εἴποι, ὡς ΗΓ κάθετός ἐστι πρὸς τὴν Γ, ὡσαύτως δὲ καὶ ΖΒ πρὸς τὴν ΒΑ, δῆλον ἔσται τὸ ἄτοπον. [*] [*]

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εἰ γὰρ ὑπὸ ΗΓ γωνία ὀρθή, καὶ ὑπὸ ΒΓΗ ὀρθὴ ἔσται.

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γωνίας 1 w 18
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p 1 w 23
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18 1 w 29
εἰ 1 w 31
γάρ 1 w 34
τις 1 w 37
εἴποι 1 w 42
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γωνία 2 w 160
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καὶ 2 w 168
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Β 4 w 173
ΓΗ 1 w 175
ὀρθὴ 1 w 179
ἔσται 2 w 184