Cavalieri, Buonaventura
,
Geometria indivisibilibvs continvorvm : noua quadam ratione promota
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LIBER VII.
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H, ad parallelepipedum ſub, FX, & </
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<
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xml:space
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quadrato, XF, cum {1/5}. </
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<
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xml:space
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">cubi, XF, hæc tria verò æquantur paralle-
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lepipedo ſub, FX, & </
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<
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echoid-s13191
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xml:space
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">rectangulo, FHX, cum {3/3}. </
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<
s
xml:id
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xml:space
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">quadrati, FX, nam
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parallelepipedum ſub, HX, & </
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<
s
xml:id
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echoid-s13193
"
xml:space
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">quadrato, XF, idem eſt cum paral-
<
lb
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lelepipedo ſub, FX, & </
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<
s
xml:id
="
echoid-s13194
"
xml:space
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preserve
">rectangulo, FXH, quod ſi ipſum iunxeris
<
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pcrallelepipedo ſub, FX, & </
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<
s
xml:id
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echoid-s13195
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xml:space
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">quadrato, XH, ſimul cum {1/3}. </
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<
s
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echoid-s13196
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xml:space
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">cubi, FX,
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ideſt vna cum parallelepipedo ſub, FX, & </
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<
s
xml:id
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xml:space
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">{1/3}. </
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<
s
xml:id
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echoid-s13198
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xml:space
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">quadrati, FX, (cum
<
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ſit communis altitudo) fiet parallelepipedum ſub, FX, & </
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<
s
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xml:space
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gulo, FXH, cum quadrato, XH, ideſt ſub, FX, & </
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<
s
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xml:space
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">rectangulo, FHX,
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& </
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<
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<
s
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xml:space
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">quadrati, FX, igitur cylindricus, FQ, ad fruſtum, ISRN,
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erit vt parallelepipedum ſub, XF, & </
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<
s
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echoid-s13203
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xml:space
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preserve
">quadrato, FH, ad parallelepi-
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pedum ſub, XF, & </
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<
s
xml:id
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echoid-s13204
"
xml:space
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">rectangulo, FHX, cum {1/3}. </
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<
s
xml:id
="
echoid-s13205
"
xml:space
="
preserve
">quadrati, FX, ideſt vt
<
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quadratum, FH, vel quadratum, PQ, ad rectangulum ſub, FH, HX,
<
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vel ſub, PQ, LM, vna cum {1/3}. </
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<
s
xml:id
="
echoid-s13206
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xml:space
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preserve
">quadrati, FX, differentiæ ipſarum
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homologarum, PQ, LM. </
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<
s
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xml:space
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">Quoniam verò conicus, OSR, eſt {1/3}. </
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<
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xml:space
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<
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xlink:label
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xlink:href
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note-0531-01a
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xml:space
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">8. huius.</
note
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lindrici, FQ, idcircò adidem fruſtum, ISRN, conicus, OSR, erit
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vt {1/3}. </
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<
s
xml:id
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echoid-s13209
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xml:space
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">quadrati, PQ, ad rectangulum ſub, PQ, LM, cum {1/3}. </
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<
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echoid-s13210
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xml:space
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ti, FX, vel vt quadratum, PQ, ad rectangulum ſub, PQ, & </
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<
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xml:space
="
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">tripla,
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LM, cum quadrato, FX, & </
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<
s
xml:id
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echoid-s13212
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xml:space
="
preserve
">conuertendo fruſtum, ISRN, ad coni-
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cum, OSR, erit vt rectangulum ſub, PQ, & </
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<
s
xml:id
="
echoid-s13213
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xml:space
="
preserve
">tripla, LM, cum {1/3}.
<
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</
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>
<
s
xml:id
="
echoid-s13214
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xml:space
="
preserve
">quadrati, FX, differentiæ earundem homologarum, ad quadra-
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tum, PQ quæ oſtendere opus erat.</
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<
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</
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<
head
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xml:space
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">ANNOTATIO.</
head
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">PEr ſuperiorem autem demonſtrationem ſuppletur prop. </
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<
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</
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<
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">1, 2. </
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<
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">necnon ei, quod colligitur in ſec. </
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<
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">& </
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<
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">4. </
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<
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eiuſdem 1. </
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<
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">Cor. </
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<
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">autem prop. </
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<
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<
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ſibilium. </
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<
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<
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<
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">eiuſdem 1. </
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<
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<
s
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">ſi intelligamus in eius figu-
<
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ra latera, CD, DB, deſcribere ſimiles figuras planas, in quibus tã-
<
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quam in baſibus cylindrici conſiſtant, quorum latera ſint, CD,
<
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pro figura, DB, & </
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<
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xml:space
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">DB, pro figura, CD, oſtendemus conſimili ibi
<
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traditæ demonſtrationi cylindricum ſublateræ, DB, baſi figura, D
<
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C, ad cylindricum ſub latere, DC, baſi figura, BD, prædictæ ſimili
<
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eſſe vt, DC, ad, DB, & </
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<
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xml:space
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">ſic etiam eſſe conicum ſub lateribus, CB, B
<
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D, baſi figura, CD, ad conicum ſub lateribus, BC, CD, baſi figura
<
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ipſius, DB, habent enim cylindrici inter ſe, necnon & </
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<
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tionem, compoſitam ex ratione baſium, & </
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<
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">altitudinum, leu late-
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rum æqualiter baſibus inclinatorum, vt ſuperius denuò animadu-
<
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<
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xlink:label
="
note-0531-02
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xlink:href
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xml:space
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5. & 8. hu.
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ius.</
note
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crſum eſt: </
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<
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<
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<
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<
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<
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