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

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134114GEOMETRIÆ nes lineas figurę, D, tunc enim comparare continuum ad continuum
non
eſſet niſi ipſa indiuiſibilia comparare;
ſed eſto, quod hoc ſit fal-
ſum
, vel quod, etiamſi verum ſit, tamen legitima ratione ad hoc pro-
bandum
nondum peruenerimus;
nihilominus adhuc dico ipſa indi-
uiſibilia
.
ſ. omnes lineas figurę, A, ad omnes lineas figuræ, D, eſſe
vt
figuram, A, ad figuram, D.
Quoniam ergo aſſumpſimus figu-
ras
, B, C, ſingulas æquales figuræ, A, &
, E, æqualem figuræ, D,
omnes
lineæ ſingularum figurarum, A, B, C, erunt æquales omni-
11Perante-
ctd
.
bus lineis figuræ, A, ſumptis iuxta dictam regulam (quacunque re-
gula
dictæ omnes lineæ ſint aſſumptæ) &
ideò quotuplex erit com-
poſitum
ex figuris, ABC, figuræ, A, totuplex erit compoſitum ex
omnibus
lineis figurarum, ABC, omnium linearum figuræ, A, &

ideò
habebimus æquè multiplicia primæ, &
tertiæ vtcunq; ſumpta;
ſimiliter oſtendemus compoſitum ex figuris, E, D, æquè multiplex
74[Figure 74] eſſe figuræ, D, ac compoſitum ex omnibus li-
neis
figurarum, E, D, multiplex eſt omnium
linearum
figuræ, D, quæ ſunt æquè multipli-
cia
ſecundæ, &
quartę vtcunque ſumpta, quia
ergo
ſi multiplex primę.
ſ. compoſitum ex figu
ris
, ABC, ſuperauerit multiplex ſecundę, ſci-
licet
compoſitum ex figuris, DE, etiam mul-
tiplex
tertiæ.
ſ. compoſitum ex omnibus lineis
figurarum
, ABC, ſuperabit multiplex quartæ
.
ſ. compoſitum ex omnibus lineis figurarum, DE, & ſi multiplex pri-
22Elicitur
ex
antec.
fuerit æquale multiplici ſecundæ, etiam multiplex tertię erit æ-
quale
multiplici quarte, ſcilicet ſi compoſitum ex figuris, ABC,
fuerit
æquale compoſito ex figuris, DE, etiam eorundem compo-
ſitorum
omnes lineæ erunt æquales, &
ſi minus, minus, ideò prima
33Defin. 5.
Qui
. El.
ad ſecundam erit, vt tertia ad quartam, ſcilicet figura, A, ad figu-
ram
, D, erit vt omnes lineæ figuræ, A, ad omnes lineas figuræ, D,
ſumptas
iuxta datas regulas.
ſ. iuxta quaſcunq; regulas, quod in fig.
44Coroll. I.
huius
.
planis erat oſtendendum.

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