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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8042Apollonij Pergæi pter parallelas D E,
57[Figure 57] B G, &
ſimilitudinẽ
triangulorum
E D I,
&
B G I, eſt D I ad I
G
, vt E D ad B G;
igitur D I ad I G ma-
iorem
proportionem
habet
, quàm G F ad
F
D, &
componendo
D
G ad G I maio rem
rationem
habebit,
quàm
eadem G D ad
D
F;
& Ideo I G mi-
nor
eſt, quàm D F.
11c
Itaque K M in M F minus eſt, quàm B G in G F, & c. Quoniam prima B G
22d ad ſecundam K M maiorem proportionem habet, quàm tertia M F ad quartam F G;
ergo ex lemmate quinto huius librirectangulum ſub intermedijs contentum K M F
minus
erit rectangulo B G F ſub extremis cõtento;
poſtea, quia H ad B G ex hypotheſi
erat
, vt G F ad F D, poſita autem fuit E D maior, quàm H, quæ eſt prima propor-
tionalium
;
ergo E D ad B G maiorem proportionem habet, quàm G F ad F D, & pro-
33Lem. 5. pterea rectangulum ſub extremis E D F maius erit rectangulo ſub intermedijs con-
tento
B G F;
fuit autem rectangulum B G F maius rectangulo K M F; igitur rectan-
gulum
E D F multò maius eſt, quàm rectangulum K M F, &
ideo, ex eodem lemma-
te
quinto, E D ad M K, nempe D R ad R M (propter ſimilitudinem triangulorum
E
D R, &
K M R) maiorem rationem habet, quàm M F ad F D.

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