# De utilitate mathematicae 135

Theon Smyrnaeus, De utilitate mathematicae, Paragraph 135. Ancient Greek.

Canonical: https://interlinea.aeterna-institute.org/library/greek/theon-smyrnaeus/de-utilitate-mathematicae/135

ὁμοίως δὲ καὶ τῶν στερεῶν τὰ μὲν ὑπὸ ἐπιπέδων παραλληλογράμμων πάντων ἓξ ὄντων περιεχόμενα παρ- αλληλεπίπεδα καλεῖται, τὰ δὲ καὶ ὑπὸ ὀρθογωνίων τού- των ὀρθογώνια. τούτων δὲ τὰ μὲν πάντη ἰσόπλευρα, τουτέστιν ἴσον ἔχοντα τὸ μῆκος καὶ πλάτος καὶ βάθος, ὑπὸ τετραγώνων ἴσων πάντων περιεχόμενα, κύβοι· τὰ δὲ τὸ μὲν μῆκος καὶ πλάτος ἴσον ἔχοντα, τουτέστι τὰς βάσεις τετραγώνους, τὸ δὲ ὕψος ἔλαττον, πλινθίδες· τὰ δὲ τὸ μὲν μῆκος καὶ πλάτος ἴσον, τὸ δὲ ὕψος μεῖζον, δοκίδες· τὰ δὲ πάντη ἀνισόπλευρα σκαληνά.

---

Theon Smyrnaeus, De utilitate mathematicae, ed. Eduardus Hiller. 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/tlg1724.tlg001.local001/.