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

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424404GEOMETRIÆ nem rectanguli, DC, CE, vel ſub, RZ, EC, ad quadratum, AV,
cum {1/3}.
quadrati, kI, ergo omnia quadrata, FC, demptis omnibus
287[Figure 287] quadratis oppoſitarum hyperbola-
rum, FAD, EVC, regula, EC, ad
omnia quadrata figuræ, FADCVE,
regula, DC, vel, AV, habebunt ra-
tionem compoſitam ex ractione re-
ctanguli, AOZ, bis cum {2/3}.
quadra
ti, KI, ad rectangulum, AZO, &
ex
ratione rectanguli ſub, RZ, EC, ad
quadratum, AV, cum {1/3}.
quadrati,
KI, .
i. cum {4/12}. quadrati, KI, quæ
ſunt {4/3}.
quadrati, LI, . i. rectanguli,
11Corol, 21.
huius.
AZV, vnde rectangulum ſub, AZ,
&
ſexquitertia, ZV, erit æquale ter-
tiæ parti quadrati, kI, erit igitur di-
cta ratio compoſita ex ratione pri-
mò dicta, &
ex ratione fectanguli
ſub, RZ, EC, ad quadratum, AV,
cum {1/3}.
quadrati, kI, ſiue cum rectangulo ſub, AZ, & ſexquitertia,
ZV, quod oſtendere propoſitum erat.
THEOREMA XXVI. PROPOS. XXVII.
SI in eadem anteced. Propoſit. figura intelligantur de-
ſcriptæ ſectiones, quæ ab Apollonio coniugatæ vo-
cantur, quæ ſint, Y &
B, HTN, coniugatæ prædictis, FAD,
EVC, habentes ſcilicet quadratum tranſuerſi lateris, &
T,
æquale rectingulo ſub alio tr anſuerſo latere, AV, &
linea
iuxta qua n poſſunt, ſiue latere recto oppoſitarum ſectionũ,
FAD, EVC, &
regula ſit DC, latus parallelogrammi, FC,
expoſitis primò ſectionibus oppoſiti, FAD, EVC, circum-
ſcriptum, æquidiſtans earu nlateri tranſuerſo, AV:
Om-
nia quadrata, FC, ad omnia quadrata figuræ, FADCVE,
demptis omnibus quadratis oppoſitarum hyperbolarum,
Y &
B HTN, quæ portionibus laterum, FE, DC, inter op-
poſitas ſectiones, Y &
B HTN, exiſtentium conſtituuntur,
erunt vt parallelepipedum ſub dimidia baſis primò expoſi-
tarum alterutrius, hyperbolarum, vt ſub, ZC, &
ſub

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