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

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281261LIBER III. ea nempè, qua omnes figuræ ſimiles circuli eſſe ſupponuntur, cæte-
ras ergo variationes ex his facillimè auidus veritatis indagator pro-
prio marte comprehendere poterit, quæ pro huius Theor.
declarat.
adieq. quoq; dilucidat. fatis effe reor.
COROLLARIVM II.
IN Propofitione fecunda, expoſita figura Coroll. antec. confor-
miter, patet, quam rationem habeat folidum fimilare genitum
ex, DN, ideft cylindricus in bafi figura deſcripta à baſi, PN, cuius
latus eſt, HN, ad ſolidum ſibi ſimilare genitum ex portione, VCB
FR,.
i. (ſi omnes figuræ ſimiles ipſius, DN, ſint circuli diametros
in, DN, habentes, &
omnes figuræ fimiles portionis, VCBFR,
ſint pariter circuli rectè axem, BO, ſecantes, &
diametros in eadem
portione ſitos habentes, quicirculi ſint genitricibus erecti) cylindrus,
DN, ad portionem ſphæræ, velſphæroidis, VCBFR, velſi figu-
173[Figure 173] ræ ſint recti lineę, patetratio, quam
habet prifma, DN, ad ſolidum ſibi
ſimilare genitum ex portione, VCB
FR, circuli, vel ellipſis, BCOF.
Ductis autem rectis, BP, PN, pa-
tet ſimiliter ratio, quam habet co-
nus, BPN, ad portionem ſphæræ,
vel ſphæroidis, VCBFR, fiue py
ramis, BPN, ad ſolldum ſimilare
genitum ex triangulo, BPN, (in-
telligeiemper hęc ſolida inuicem ge-
nita iuxta regulas in Theorematibus
aſſumptas, ne toties id repetatur)
ſiue tandem, quam habet vniuerſa-
liter ſolidum ſimilare genitum ex, DN, vel triangulo, BPN, ad ſo-
lidum ſibi ſimilare genitum ex portione, VCBFR, &
hocſi, BO,
ſit axis quod ſi tantum fit diameter eædem rationes colligentur ad
modum ſuperioris Theorematis.
Eſtergo in figura cylindricus, D
N, adportionem ſphæræ, vel ſphæroidis, VCBFR, vel priſma,
DN, ad ſolidum ſimilare genitum ex portione, VCBFR, veltan-
dem quodlibet ſolidum ſimilare genitum ex, DN, ſiue quilibet cy-
lindricus genitus ex, DN, ad ſolidum ſibi ſimilare genitum ex por-
tione, VCBFR, vt rectangulum ſub, BA, &
tripla, AO, adre-
ctangulum ſub, BM, &
ſub compofita ex, MO, OA. Solidum ve-
rò ſimilare genitum ex triangulo, BPN, ſiue ſit conus, ſiue pyramis,
ſiue tantum conicus, ad ſibi ſimilare genitum ex portione,

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