Bibliotheca Polyglotta

Euclid: Elementa

Πόρισμα
Ἐκ δὴ τούτου φανερόν, ὅτι ἐὰν τέσσαρες εὐθεῖαι ἀνάλογον ὦσιν, ἔσται ὡς ἡ πρώτη πρὸς τὴν τετάρτην, οὕτω τὸ ἀπὸ τῆς πρώτης στερεὸν παραλληλεπίπεδον πρὸς τὸ ἀπὸ τῆς δευτέρας τὸ ὅμοιον καὶ ὁμοίως ἀναγραφόμενον, ἐπείπερ καὶ ἡ πρώτη πρὸς τὴν τετάρτην τριπλασίονα λόγον ἔχει ἤπερ πρὸς τὴν δευτέραν.

eng

PORISM.
From this it is manifest that, if four straight lines be proportional, as the first is to the fourth, so will a parallelepipedal solid on the first be to the similar and similarly described parallelepipedal solid on the second, inasmuch as the first has to the fourth the ratio triplicate of that which it has to the second.

lat Sic

(Porisma)
Ex hoc ergo manifestum quoniam si quattuor linee proportionales fuerint, erit ut prima ad quartam ita quod a prima solidum equidistantibus planis contentum ad illud quod a secunda et simile et similiter descriptum quoniam et prima ad quartam triplam proportionem habet quam ad secundam.

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