Cavalieri, Buonaventura
,
Geometria indivisibilibvs continvorvm : noua quadam ratione promota
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GEOMETRIÆ
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ſpatio, CQPD, maior erit ſpatio, HTYL, & </
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xml:space
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">multò maior erit figu-
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ra iam deſcripta, ab eodem ſpatio, HTYL, compi ehenſa, quod eſt
<
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<
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Lem.</
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abſurdum, cum enim parallelogiammum, E&</
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ipſi, RX, necnon, NP, ipſi, SY, tota toti adæquator contra præ-
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demonſtrata, nec ergo figura, HTYL, minor eſſe poteſt figura, C
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QPD, ſed neque eadem maior, vt oſtenſum eſt, ergo eidem æqua-
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lis etit, quod demonſtrare oportebat. </
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<
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xml:space
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">Vnamquamque autem di-
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ctarum figurarum, CQPD, HTYL, pręfatas conditiones haben-
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tium, figuram in alteram partem deficientem appellabimus, regu-
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la baſi, ſeu quacunq; </
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<
s
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xml:space
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">illi ęquidiſtante.</
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<
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xml:space
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">tota ſit in eodem plano, cuioc-
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currat recta in duobus punctis, aut rectis lineis, vel in
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recta, & </
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<
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xml:space
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">puncto, poterimus aliam rectam lineam præfatæ
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æquidiſtantem ducere, quæ tangat portionem curuæ lineæ
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inter duos predictos occurſus continuatam.</
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</
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<
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">_T_Angere autem dico rectam lineam aliam quamcunque curuam
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totam in eodem plano cum ea exiſtantem, cum ipſa recta linea
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ſiue in puncto, ſiue in recta linea, euruæ, occurrente, eadem curua vel
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tota eſt ad eandem partem, vel illius nihil eſt ad alteram partem illi
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occurrentis rectæ lineæ.</
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">Sit curua linea, BAC, tota in eodem exiſtens plano, cui recta, B
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C, occurrat in duobus punctis, ſeu rectis lineis, vel in recta, & </
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cto, B, C. </
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<
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ipſi, BC, æquidiſtantem ducere poſ-
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ſe, quæ tangat portionem curuæ li-
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neæ inter duos occurſus, B, C, con-
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tinuatam. </
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<
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xml:space
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">Quoniam ergo recta eſt,
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BC, & </
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<
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">curua, BAC, ideò inter ſe ſpa-
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tium comprehendent, figuramque,
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vt, BAC, conſtituent, ergo poſſibi-
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le erit figuræ, BAC, reſpectu rectæ, BC, verticem inuenire, ſit is
<
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">1. lib. 7.</
note
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punctum, A, per quod ducatur, DF, parallela, BC, igitur, BF, tan-
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get figuram, BAC, ergo totus ambitus, BAC, eſt ad eandem </
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