Cavalieri, Buonaventura
,
Geometria indivisibilibvs continvorvm : noua quadam ratione promota
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GEOMETRI Æ
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pro alis in hac propoſitione ſit pariter regula, extendaturq; </
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<
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indevt ſecet EC, vt in, N, HV, vt in, R, & </
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<
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">PV, vt in, Q, ergo, CG,
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ad, MO, erit vt quadratum, GH,
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ad rectangulum ſub compoſita
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ex, HG, GO, & </
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</
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<
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<
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non dependet à prop. </
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<
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get, quod denuò demonſtretur)
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ideſt vt quadratum, GV, ad qua-
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dratum, OR, ſed vt, CG, ad MO,
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ita eſt quadratum, CG, ad rectan-
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gulum ſub, CG, ſeu, NO, & </
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<
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">OM, ergo quadratum, CG, ad rectan-
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gulum, NOM, erit vt quadratum, GV, ad quadratum, OR, & </
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<
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mutando quadratum, CG, ad quadratum, GV, erit vt rectan-
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gulum, NOM, ad quadratum, OR, ſic ductis alijs parallelis
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euenire oſtendemus; </
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<
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">ergo ſolidum rectangulum ſub, EG, paral-
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lelogrammo, & </
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">ſemiparabola, CHG, erit proportionaliter ana-
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logum quadrato ſolido quadrantis, HVG, ſecundum regulam,
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C V, ſecundum eandem autem oſtendemus etiam quadratum
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ſolidum, EG, eſſe proportionaliter analogum quadrato ſolido, H
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V, etenim quadratum, CG, ad quadratum, GV, eſt vt quadratum,
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NO, ad quadratum, OQ, vnde vt quadratum, CG, ad quadratum,
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GV, ſic erit quadratum ſolidum, EG, ad quadratum ſolidum, G
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P, & </
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">ſic etiam rectangulum ſolidum ſub, EG, HCG, ad quadratum
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ſolidum, HGV, ergo quadratum ſolidum, EG, ad quadratum ſoli-
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dum, HV, erit vt rectangulum ſolidum ſub, EG, HCG, ad quadra-
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tum ſolidum, HGV, ergo permutando quadratum ſolidum, EG, ad
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rectangulum ſolidum ſub, EG, HCG, erit vt quadratum ſolidum,
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HV, ad quadratum ſolidum, HGV, ſed quadratum ſolidum, HV,
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<
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ex 20. hu-
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ius.</
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ſequialterum eſt quadrati ſolidi, HGV, cum, VG, tranſeat per cen-
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trum, G, ergo quadratum ſolidum, EG, ſexquialterum erit rectan-
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guli ſolidi ſub, EG, HCG, ſed vt quadratum ſolidum, EG, ad rectan-
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gulum ſolidum ſub, EG, HCG, ita baſis, EG, ad baſim, HCG, ergo,
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EG, erit ſexquialtera, HCG, & </
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<
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huius.</
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lib. </
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quod oſtendendum erat.</
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pars deducetur, vt ibi, hac vero demonſtrata reliqua </
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