γίνονται ε. ταῦτα ἐπὶ τὰ κβ· γίνονται ρῑ. ταῦτα ἐπὶ τὸ ὕψος, ἐπὶ τὸ ᾱ· γίνονται ρῑ· ὧν ζ΄ γίνονται ῑε U+2220΄ ζ΄ ιδ΄. ταῦτα ἐπὶ τὸ πλάτος, ἐπὶ τὰ γ· γίνονται μζ ζ΄.
Stereometrica. Hero of Alexandria. ed. Johan Ludvig Heiberg. United States. 2018.
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