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

Table of contents

< >
[331.] THEOREMA XVI. PROPOS. XVII.
[332.] COROLLARIVM I.
[333.] COROLLARIVM II.
[334.] THEOREMA XVII. PROPOS. XVIII.
[335.] COROLLARIVM.
[336.] THEOREMA XVIII. PROPOS. XIX.
[337.] COROLLARIVM.
[338.] THEOREMA XIX. PROPOS. XX.
[339.] COROLLARIVM.
[340.] THEOREMA XX. PROPOS. XXI.
[341.] COROLLARIVM.
[342.] THEOREMA XXI. PROPOS. XXII.
[343.] THEOREMA XXII. PROPOS. XXIII.
[344.] THEOREMA XXIII. PROPOS. XXIV.
[345.] THEOREMA XXIV. PROPOS. XXV.
[346.] THEOREMA XXV. PROPOS. XXVI.
[347.] THEOREMA XXVI. PROPOS. XXVII.
[348.] THEOREMA XXVII. PROPOS. XXVIII.
[349.] THEOREMA XXVIII. PROPOS. XXIX.
[350.] THEOREMA XXIX. PROPOS. XXX.
[351.] THEOREMA XXX. PROPOS. XXXI.
[352.] COROLLARIVM.
[353.] THEOREMA XXXI. PROPOS. XXXII.
[354.] COROLLARIVM.
[355.] THEOREMA XXXII. PROPOS. XXXIII.
[356.] COROLLARIVM.
[357.] THEOREMA XXXIII. PROPOS. XXXIV.
[358.] SCHOLIVM.
[359.] COROLLARIVMI.
[360.] COROLLARIVM II.
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page |< < (236) of 569 > >|
256236GEOMETRIÆ go, vt quadratum, EY, ad quadratum, YS, ita rectangulum, TZ
11Ex 3. Co-
nic
. p. 17.
S, ad rectangulum, BZA, eodem modo (ſumptoin, AB, vtcun-
quepuncto
, M, &
per, M, ducta, CMG, parallela ipſi, BF,) ſe-
quetur
rectangulum, GMC, ad rectangulum, BMA, eſſe vt qua-
dratum
, EY, ad quadratum, YS, ergo rectangulum, TZS, ad re-
ctangulum
, BZA, erit vt rectangulum, GMC, ad rectangulum,
BMA
, &
ſic dereliquis oſtendemus . i. rectangula ſub portione, AS
B
, &
quadrilineo, AHTFB, adrectangula ſub omnibus abſciſſis,
AB
, &
reſiduis abſciſſarum eiuſdem . i. adrectangula ſub triangulis,
ABD
, AVD, (ſunt .
n. rectangula ſub omnibus abſciſſis, AB, &
reſiduis
abſciſſarum eiuſdem, æqualia rectangulis ſub duobus triangu-
22Coroll. 2. lis, ABD, AVD,) erunt vt rectangulum, TZS, adrectangulum,
33Prop. 19.
lib
. 2.
AZB, ideſt vt quadratum, EY, ad quadratum, YS, vel vt quadra-
tum
, SX, ad quadratum, XE, vel vt quadratum, ST, ad quadra-
tum
, ER;
ergo rectangula ſub portione, ASB, & quadrilineo, A
HTFB
, ad rectangula ſub triangulis, ABD, AVD, erunt vt qua-
dratum
, ST, ad quadratum, ER;
quod oſtendere oportebat.
HINC patet, quoniam probauimus, omnia quadrata, AD, ſex-
cupla
eſſe rectangulorum ſub triangulis, ABD, AVD, quod
in
circulo eadem quadrat a ſint ſexcupla rectangulorum ſub portione,
ASB
, &
quadrilineo, AHTFB. In ellipſi verò, quia pariter om-
nia
quadrata, AD, rectangulorum ſub triangulis, ABD, AVD,
ſunt
ſexcupla .
i. ſunt ad illa, vt cubus, AB, ad ſui ipſius ſextam par-
tem
, inſuper rectangula ſub triangulis, ABD, AVD, adrectangula
44Cor. 24.
lib
. 2.
ſub portione, ASB, &
quadrilineo, AHTFB, ſunt vt quadra-
tum
, ER, conuertendo ad quadratum, ST, .
i. vt ſexta pars cubi, AB,
ad
eiuſdein talem partem, ad quam ipſa ſextapars ſit, vt quadratum, E
R
, ad quadratum, ST, binc ex æquali omnia quadrata, AD, in elli-
pſi
, ad rectangula ſub portione, ASB, &
quadrilineo, AHTFB,
erunt
vt cubus, AB, ad ſui ipſius eam partem, ad quam eiuſdem cubi,
AB
, ſextapars ſit veluti quadratum, ER, ad quadratum, ST.
Ve-
rum
ſi in ellipſi diametri non ſint axes, vice cubi, AB, concludemus
omnia
quadrata, AD, adrectangula ſub portione, ASB, &
quadri-
lineo
, AHTFB, eſſe vt parallelepipedum ſub altitudine, AB, baſi
rhombo
quod ab ipſa, AB, deſeribitur, ad ſui ipſius eam partem, ad
quam
eiuſdem parallelepipedi pars ſexta ſit veluti quadratum, ER, ad
quadratum
, ST,

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