Ceva, Giovanni, Geometria motus, 1692

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Tab. 3. Fig. 3.
Tab. 3. fig 2.
Def. 8. huius.
Pr. 10. huius.
Pr. 9. huius.

IH
vt DC ad AB; cumque ſit cubus ex AE ad cubum ex
DE
ſicut quadroquadratum ex DC ad quadroquadratum
ex
AB, erit etiam quadroquadratum ex FG ad quadro­
quadratum
ex IH, vt cubus ex AE ad cubum ex DE; ſi
igitur
intelligatur quædam ratio, quæ ſit ſubduodecupla
tam
rationis quadroquadratorum quàm huic ſimilis cu­
borum
prædictorum, erit porrò FG ad IH triplicata, &
AE
ad ED quadruplicata eiuſdem dictæ ſubduodecuplæ;
quamobrem
etiam ratio figuræ GFK ad figuram IHK, quæ
eſſe
debet vt AE ad ED, erit quadruplicata eiuſdem ſub­
duodecuplæ
: & ideò ſi ponamus IK ad KI in ratione

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