Apollonius <Pergaeus>, Apollonii Pergaei Conicorvm Lib. V. VI. VII. paraphraste Abalphato Asphahanensi : nunc primum editi ; additvs in calce Archimedis assvmptorvm liber, ex codibvs arabicis mss Abrahamus Ecchellensis Maronita latinos reddidit, Jo. Alfonsvs Borellvs curam in geometricis versione contulit & [et] notas vberiores in vniuersum opus adiecit

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8345Conicor. Lib. V.
Et cum B I intercipiatur inter illas patebit etiam, & c. Et cum B I intercipia-
22l tur inter duos ramos breuiſecantes E K, qui ducuntur ex punctis K, in quibus hy-
perbole
K T L ſecat parabolen A B L, cadet punctum T hyperboles intra parabolen;
quare rectangulum B G F maius erit rectangulo T G F, ſeu K M F, quod æquale eſt
rectangulo
E D F, vt dictum eſt, quare E D ad B G, ſeu D I ad I G (propter ſimili-
33Lem. 5.
præmiſ
.
tudinem triangulorum E D I, B G I) habebit minorem proportionem, quàm G F ad
F
D, &
componendo, eadem D G ad G I minorem proportionem habebit, quàm ad
F
D, ſiue ad A C, &
ideo I G maior erit, quàm A C.
Deinde ex con-
44m60[Figure 60] curſu E ad ſectio-
nem
, &
c. Deinde
ex
concurſu E ad ſe-
ctionem
A B parabo-
len
educantur duo ra-
mi
E X ſupra breui-
ſecantem
E K in pri-
ma
figura, &
infra
eamdem
in figura ſe-
cunda
, &
ex punct is
X
ducantur due X Y
perpendiculares
ad
axim
, ſecantes axim
in
Y, &
hyperbolen K
T
in a exiſtẽte extra
parabolen
;
cumque
duæ
rectæ a Y, necnõ
T
G parallelæ ſint cõ-
tinenti
F V, &
inter-
ponātur
inter hyper-
bolẽ
K T, &
reliquã
continentem
F A eritrectangulum a Y F æquale rectangulo T G F, quod factum
5512. lib. 2. eſt æquale rectangulo E D F, eſtque X Y portio ipſius a Y;
igitur rectangulum E D F
maius
erit rectangulo X Y F, &
ideo E D ad X Y, ſeu D b, ad b Y (propter ſimilitu-
66Lem. 5.
præmiſ
.
dinem triangulorum E D b, X Y b) maiorem rationem habet, quàm Y F ad F D, &

componendo
eadem D Y ad Y b maiorem proportionem habebit, quàm ad D F, ſeu
C
A.

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