λ· εὑρεῖν αὐτοῦ τὸ ἐμβαδόν. ποιῶ οὕτως· ὥσπερ καὶ ἐπὶ τῶν κύκλων ἀπὸ τῶν ζ ποδῶν τῆς διαμέτρου καὶ ἔστω τὸ ἐμβαδὸν
ποδῶν λη U+2220΄· καὶ λαμβάνω ἀπὸ τῶν λ ποδῶν τοῦ ὕψους ἢ τῆς καθέτου τὸ γʹ· γίνονται ῑ. ταῦτα ποιῶ ἐπὶ τὰ λη U+2220΄·γίνονται
πόδες τπε. τοσούτων ποδῶν ἔσται τὸ στερεὸν τοῦ κώνου.
Stereometrica. Hero of Alexandria. ed. Johan Ludvig Heiberg. United States. 2018.
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