Cavalieri, Buonaventura, Geometria indivisibilibvs continvorvm : noua quadam ratione promota

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376356GEOMETRIÆ. parabolam, DBF, (hoc autem vocetur Semianulus latus parabot
licus) &
ad ſolidum genitum ex figura, HBDM, eſſe vt quadra.
tum, DM, ad quadratum, ME, {1/2}. quadrati, ED, cum rectangu-
lo ſub ſexquitertia, DE, &
ſub, EM, quod vocetur Semibaſis co-
lumnaris parabolica lata;
Et vniuerſaliter ſolidum ſimilare geni-
257[Figure 257] tum ex, AM, ad ſibi ſimilare genitum ex figura, HBDM, habe-
re eandem rationem proximè dictæ ad idem verò dempto ſolido
ſimilari genito ex quadrilineo, BFMH, eſse vt, AF, ad parabo-
lam, DBF,.
. in ratione ſexq uialtera.
SECTIO POSTERIOR,
IN Coroll. poteſt colligi etiam in Cor. 10. Prop. 51. Sect. po-
ſter.
concludi poſse cylindrum in reuolutione genitum ex, AF,
ad ſemibaſim columnarem ſtrictam parabolicam genitam ex figu-
ra, CBDF, eſse vt quadratum, DF, ad quadratum, FE, {1/2}, qua
drati, ED, &
rectangulum ſub ſexquitertia, DE, & ſub, EF, &
ſic eſſe ſolida ſimilaria ex eiſdem genita iuxta communem regu-
lam DF.
COROLL. XIII. SECTIO PRIOR.
IN Prop. 35. iterum aſsumpta antecedentis figura, patet cylin-
drum genitum in reuolutione ex, BM, .
i. cylindrum, BY, ad
ſolidum genitum ex reuolutione figuræ, BHMF, .
ſ. ad ſolidum,
BFKR, quod vocetur Semitympanum parabolicum, eſse vt qua-
dratum, EM, ad quadratum, MF, cum rectangulo ſub {2/3}.
EF, &
FM, vna cum {1/6}.
quadrati, EF; & ſic eſse ſolidum ſimilare geni-
tum ex, BM, ad ſibi ſimilare genitum ex figura, BHMF, iuxta
communem regulam, DM.

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