Cavalieri, Buonaventura
,
Geometria indivisibilibvs continvorvm : noua quadam ratione promota
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GEOMETRIÆ
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<
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<
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<
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<
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xml:space
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">ex ea enim pariter habe-
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tur omnes cylindricos eandem rationem habere ad conicos
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in eadem baſi, & </
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<
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xml:space
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">altitudine cum ipſis exiſtentes, cum eorum eſſe
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triplos fuerit demonſtratum, & </
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<
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">eadem, quæ ex ipſa deduceban-
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tur, hic pariter colliguntur, proprietates inquam illæ, quas cylin-
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dricis competere dictum eſt in Annot. </
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<
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<
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ratum, ac firmum eſt, Conicos in eadem, vel æqualibus baſibus
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exiſtentes, eſſe inter ſe vt altitudines. </
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<
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<
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ſitam ex ratione baſium, & </
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<
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ſes altitudinibus reciprocantur, æquales eſſe, & </
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<
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altitudinibus reciprocari. </
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<
s
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xml:space
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">Ac tandem ſimiles conicos eſſe in tri-
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pla ratione linearum, vel laterum homologorum eorundem ba-
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ſium, ſeu ſimilium triangulorum per verticem traſeuntium, quæ
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in ipſius prop. </
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<
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ter colligebantur. </
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</
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<
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">cum per eam ibi demonſtrati intendatur cylindricum quemcũq; </
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triplum eſſe conici in eadem baſi, & </
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<
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">altitudine cum eo exiſtentis,
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vt in Sec. </
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<
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<
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tem, quod pag. </
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<
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">cum omnibus quadratis_
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_duorum triangulorun CBM, EMF_, ponenda ſunt poſt hæc verba,
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_dupla erunt omnium quadratorum, AF_.</
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rum conicorum, à quibus abſcinduntur, conſtituta;</
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inter ſe ſunt vt baſes.</
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<
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<
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<
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">huius, in quo ſint conicorum æquè
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altorum, AkLM, BSQTR, fruſta, GIOLKM, XVTS, in eiſdem
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cum illis baſibus, kLM, SQTR, & </
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<
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">in æqualibus altitudinibus, C
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E, DF, exiſtentia, igitur abſciſſis verſus puncta, C, D, altitudinum
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partibus æqualibus, & </
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<
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parallelis, oſtendemus ab ijſdem productas in fruſtis figuras eſſe
<
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<
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inter ſe vt ipſæ baſes eodem modo, quo ibi factum eſt, vnde pate-
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bit dicta ſruſta eſſe figuras proportionaliter analogas, quapropter
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ipſa eſſe inter ſe vt baſes pariter concludemus, quod erat demon-
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ſtrandum.</
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