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

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260240GEOMETRIÆ circulo ſunt ſexcupla rectangulorum ſub portione, RFV, & qua-
drilineo, RTHYV, .
i. ſunt adilla, vt cubus, RV, ad ſui ipſius
ſextam partem.
In ellipſi verò omnia quadrata, RZ, ad rectangu-
la ſub portione, RFV, &
quadrilineo, RTHYV, ſunt vt cubus,
RV, vel parallelepipedum ſub altitudine, RV, baſi rhombo, RZ,
ad ſui ipſius eam partem, ad quam ſexta pars eiuſdem cubi, vel pa-
rallelepipedi ſit, vt quadratum, CE, primæ diametri, ad quadra-
tum, FH, ſecundæ;
ergo ex æqualiin circulo omnia quadrata, K
G, adrectangula ſub portione, RFV, &
ſub quadrilineo, RTH
YV, erunt vt parallelepipedum ſub altitudine, BK, baſi quadra-
to, KL, vel (quodidem eſt) vt parallelepipedum ſub, LK, &
re-
ctangulo, KG, ad, {1/6}, cubi, RV.
In ellipſi verò eadem erunt, vt
parallelepipedum ſub altitudine, LK, baſi parallelogrammo, KG,
ad eam partem cubi, RV, vel dicti parallelepipedi ſub, RV, &

161[Figure 161] rhombo, RZ, ad quam eiuſdem cubi,
vel parallelepipedi ſexta pars ſit, vt
quad.
CE, ad quadratum, FH.
Sunt autem omnia quadrata, KG, ad
omnia quadrata figurarum, RCLT,
VEGY, demptis, omnibus quadratis
trilineorum, CLT, EGY, vna cum
omnibus quadratis, RY, &
cum re
δtangulis ſub portione, RFV, &
ſub,
RY, ſemel, vt, KG, ad portionem,
TCFEY, vt oſtendimus .
i. ſumpta, K
L, communi altitudine, vt parallelepi-
pedum ſub altitudine, KL, baſi paral
11G. B. Cor.
4. Gen.
34. l. 2.
lelogrammo, KG, ad cylindricum ſub
eadem altitudine, KL, &
ſub baſi por
tione, TCFEY, ergo, colligendo,
omnia quadrata, KG, ad omnia qua
drata portionum, RCT, VEY, cum
rectangulis bis ſub ijſdem, &
ſub trili
neis, CLT, EGY, inſuper ad omnia
quadrata, RY, cum rectangulis ſub, R
Y, &
portione, RFV, ſemel, & ad rectangula ſub eadem portio-
ne, RFV, &
quadrilineo, RTHYV, ideſt ad omnia quadrata
portionis, RFV, cum rectangulis iterum ſub eadem, &
ſub, RY,
quia rectangula ſub portione, RFV, &
quadrilineo, RTHYV,
ſeparantur per lineam, TY, inrectangula ſub, RY, &
portione,
RFV, &
ſub portione, THY, & portione, RFV, quæ ſunt om-
22A. 23. l. 2. nia quadrata portionis, RFV, .
i. (his omnibus in vnam

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