Cavalieri, Buonaventura
,
Geometria indivisibilibvs continvorvm : noua quadam ratione promota
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LIBER IV.
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<
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xml:space
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">Sit ergo parabola, HBM, cuius axis, vel diameter, BG, baſis,
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http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/05TCTFNR/figures/0357-01
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HM, ducatur autem intra ipſam
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eidem, BG, parallela, EF, ducta
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verò tangente, AC, in termino,
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B, quæ erit parallela baſi, HF, pro-
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ducatur verſus, FE, illi productæ
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occurrens in, C, & </
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<
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rallelogrammum, AF, regula ve-
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rò ſit, HM. </
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<
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drata, AF, ad omnia quadrata fi-
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guræ, CBHF, eſſe vt quadratum, HF, ad quadratum, FG, {1/2}. </
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<
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dtati, GH, & </
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<
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autem erit conſimilis demonſtrationi ſecundæ partis Theor. </
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<
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<
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<
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<
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">figura oſtendemus omnia
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quadrata, AF, ad omnia quadrata figuræ, CBHF, dem-
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ptis omnibus quadratis trilinei, BCE, eſſe vt parallelepi-
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peduw ſub, BG, & </
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<
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">quadrato, HF, ad reliquum parallelepi-
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pedi ſub, BG, & </
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<
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<
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GH, & </
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dem dempto {1/3}. </
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<
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">Nam omnia quadrata, AF, ad omnia quadrata, BF, ducta per,
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E, ipſa, EI, æquidiſtans, HM, ſunt vt parallelepipedum ſub, AH,
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& </
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<
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<
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ſuut autem omnia quadrata, BE, ſexcupla ommum quadratorum
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trilinei, BCE, ideò omnia quadrata, AF, ad omnia quadrata tri-
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linei, BCE, erunt vt parallelepi-
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pedum ſub, AH, vel, BG, & </
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quadrato, HF, ad parallelepipedi
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ſub, BI, & </
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<
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partem: </
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<
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ta, AF, ad omnia quadrata figuræ,
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CBHF, ſunt vt quadratum, HF,
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ad hæc ſpatia .</
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<
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{1/2}. </
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ſub ſexquitertia, HG, & </
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<
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tudine, vt parallelepipedum ſub, BG, & </
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