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

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505485LIBER VII.338[Figure 338] ipſi, SV, quod, & de cæteris quibuſcunq; ipſi, AD, parallelis in
vtraque
figura liquidò apparet.
Quod verò pars vnius figuræ, vt,
BZ
&
, congruat neceſſariò parti figuræ, @βΛ, & non toti, dum fit
ſuperpoſitio
tali lege, quali dictum eſt, ſic demonſtrabitur.
Cum
enim
ductis quibuſcunq;
ipſi, AD, parallelis conceptæ in figuris
ipſarum
portiones, quæ erant ſibi in directum, adhuc poſt ſuper-
poſitionem
maneant ſibi in directum, illæ vero ante ſuperpoſitio-
nem
effent ex hypoteſi æquales, ergo poſt ſuperpoſitionem por-
tiones
parallelarum ipſi, AD, in figuris ſuperpoſitis conceptæ erũt
pariter
æquales, vt ex.
g. QR, ST, ſimul ſumptæ æquabuntur ipſi,
SV
, ergo niſi vtræque, QR, ST, congruant toti, SV, congruente
parte
alicui parti, vt, ST, ipſi, ST, erit, QR, æqualis ipſi, TV, &
,
QR
, quidem erit in reſiduo figuræ, BZ&
, ſuperpoſitæ, TV, verò
in
reſiduo ſiguræ, @βΛ, cu@ fit ſuperpoſitio.
Eodem modo oſten-
demus
cuicunq;
parallelæ ipſi, AD, conceptæ in reſiduo, figuræ, B
Z
&
, ſuperpoſitæ, quod ſit, H℟597, reſpondere in directum ęqua-
lem
rectam lineam, quę erit in reſiduo figuræ, @βΛ, cui fit ſuper-
poſitio
, ergo ſuperpoſitione hac lege facta, cum ſupereſt aliquid
de
figura uperpoſita, quod non cadatſuper figuram, cui fitſu-
perpoſitio
, neceſſe eſt reliquæ figuræ aliquid etiam ſupereſſe, ſuper
quod
nihil ſit ſuperpoſitum.
Cum autem vnicuiq; rectæ lineæ
parallelę
, AD, conceptæ in reſiduo, vel reſiduis (quia poſſunt eſſe
plures
figuræ reſiduæ) figuræ, BZ&
, ſiue, C℟γ, ſuperpoſitæ, re-
ſpondeat
in directum in reſiduo, vel reſiduis ſiguræ;
CβΛ, alia re-
cta
linea, manifeſtum eſt has reſiduas figuras, ſiue reſiduarum ag-
gregata
, eſſe in eiſdem parallelis, cum ergo reſidua figura,

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