Apollonius, of Perga, Eutocius, of Ascalon, Pappus, of Alexandria, Commandino, Federico, 1509-1575, Serenus, Antinoensis, Burndy Library, donor. DSI · Bononiæ : Ex Officina Alexandri Benatii · leaf 287
SERENI LIBER II. Sir datus conus fcalenus, cuius axis ab:&bafis ced circulus: oporteatq; eum ita fecare, uti dictum eft. Secetur primo per axem plano a c d ad redos angulos ipfi cir- culo ced: & ducatur perpendicularis a g,quae cadet in lineam cd,trianguli acd ba~ fim : ipli uero cd ad redos… … crureeiTe.iunganturenim eg, fg. & quoniam cd ipfam effecans ad redos angu- los f bifariam fec at: erit e g aequalis g f communis autem a g: & uterque angulorum a g e, a g f redus. ergo e a eft aequalis a f: & idcirco triangulum a e f eft sequicrure. £x quibus conftat omnia triangula, qua! bafes…
Mathematics, Greek · Conic sections · Mathematics
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