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

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179159LIBER II.
THEOREMA XXIV. PROPOS. XXIV.
Sit parallelogrammum, AG, in eo ducta diameter, CE, regula
vtcunque
latus, EG.
Dico omnia quadrata, AG, eſſe tripla om-
nium
quadratorum trianguli cuiuſuis, AEC, ſiue, CEG.
Diui-
dantur
bifariam latera, AC, CG, in punctis, B, H, &
per, B, ip-
ſi
, CG, perque, H, ipſi, CA, parallelę ducantur, BF, DH, quę
ſe
cum recta, CE, communiter bifariam ſecabuntin puncto, M.
Quia igitur in figura, ſiue parallelogrammo, AG, ducitur linea, B
F
, quę omnes æquidiſtantes ipſi, EG, bifariam ſecat, &
, CE, quæ
102[Figure 102] eaſdem in partes inæquales diuidit, pręter-
quam
, DH, omnia quadrata trianguli, A
11Per I. Co-
rol
. antec.
EC, cum omnibus quadratis trianguli, C
EG
, &
cum omnibus quadratis duorum
22Vide D.
lib
. 7. An-
not
. Pro-
pofit
. 8.
triangulorum, CBM, EMF, dupla erunt
omnium
quadratorum, AF, licet enim, D
H
, perlineam, CE, fit non bifariam diui-
ſa
, nihil tamen hoc obſtat noſtro propoſi-
to
, nam &
ipſi, DH, contingit, veluti ijs,
quæ
inæqualiter ſecantur, quadratum ſe-
ctarum
partium, ſcilicet quadrata, DM,
MH
, dupla eſſe quadratorum dimidiæ, nempè quadrati, DM, &

eius
, quæ inter ſectiones interijcitur, quæ hic nulla eſt, cum duę ſe-
cantes
, BF, CE, vniantur in puncto, M:
Sunt autem omnia qua-
drata
trianguli, AEC, æqualia omnibus quadratis trianguli, CE
G
, quia ſunt triangula in æqualibus baſibus, EG, AC, &
eadem al-
33Ex B. vel
C
. Corol.
Prop
. 22.
huius
.
titudine licet euersè poſita, &
ideò omnia quadrata trianguli, CE
G
, ſunt æqualia omnibus quadratis, AF, cum omnibus quadratis
triangulorum
, CBM, MEF.
Quoniam verò omnia quadrata tri-
anguli
, BMC, funt æqualia omnibus quadratis trianguli, CMH,
omnia
verò quadrata trianguli, CEG, ad omnia quadrata triangu-
li
, CMH, ſunt in tripla ratione eius, quam habet, GC, ad, CH,
quæ
eſt dupla .
i. in ratione octupla, & hoc, quia triangula, CEG,
CMH
, ſunt ſimilia, ideò omnia quadrata, CEG, erunt

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