Cavalieri, Buonaventura
,
Geometria indivisibilibvs continvorvm : noua quadam ratione promota
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GEOMETRIÆ
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<
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xml:space
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<
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">SI recta linea bifariam ſecta fuerit, & </
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<
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">illi in directum ad-
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iuncta quæuis recta linea; </
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<
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poſita ex dimidia propoſitæ, & </
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<
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">ex adiuncta linea, & </
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ctangulo ſub compoſita ex tota, & </
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<
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">adiuncta, & </
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cta, vna cum parallelepipedo ſub compoſito ex eadem pro-
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poſitæ medietate, & </
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<
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">ex adiuncta, & </
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">ſub quadrato eiuſdem
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medietatis, æquabitur cubo compoſitæ ex dicta medietate,
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& </
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<
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<
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">Sit recta linea propoſita, AC, bifariam in, B, diuiſa, cui in dire-
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ctum ſit adiuncta vtcumq; </
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& </
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">rectangulo, AEC, vna cum parallelepipedo ſub, BE, & </
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drato, BC, æquari cubo ipſius, BE. </
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">Nam rectangulum, AEC, cum
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quadrato, CB, æquatur quadrato, BE, igitur (ſumpta communi
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Elem.</
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altitudine, BE,) parallelepipedum ſub, BE, & </
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vna cum parallelepipedo ſub, BE, & </
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<
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rallelepipedo ſub, BE, & </
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<
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oſtendendum.</
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">_E_X methodo in ſuperioribus demonſtrationibus adhibita manifeſtum
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eſt nos ſimiliter cęteras Propoſitiones ſecundi Elementorum de-
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monſtrare poſſe, in quibus linea ſecta in vno, vel pluribus punctis con-
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ſideratur, ad parallelepipeda eadem traducentes, nam ſi ſuper ſpatia
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in illis conſiderata intelligantur conſtitui æquè alta parallelepipeda,
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erunt illa, vt ipſę baſes, propterea quę ibi de baſibus demonſtrantur,
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de parallelepipedis æquè altis eiſdem baſibus inſiſtentibus rectè colligi
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poſſunt, quæ ob claritatem, & </
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<
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tionalibus continetur, æquale eſt cubo mediæ.</
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