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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[275] Cc 2
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196158Apollonij Pergæi
Sumantur duæ abſciſſæ B C, F H, quarum C B ad B D habeat maiorem pro-
portionem
, quàm habet H F ad F I, &
C B, H F ſecentur proportionaliter in
R
, V.
, & per ea puncta ducantur ad axes ordinatim applicatæ A C, E H, Q
R
, T V.
Quoniam quadratum A C ad rectangulum G C B eandem proportio-
214[Figure 214] nem babet, quàm latus rectum D B ad tranſuerſum G B, pariterq;
quadratum
1121. lib. 5. E H ad rectangulum K H F eſt vt I F ad F K;
atq; D B ad B G ex hypotheſi,
eſt
vt I F ad F K;
ergo quadratum A C ad rectangulum G C B eandem pro-
portionem
habet quàm quadratum E H ad rectangulum K H F :
& quia G B
ad
B D eſt vt K F ad F I, &
D B ad B C minorem proportionẽ habet quàm
I
F ad F H, ergo ex æquali G B ad B C, minorem proportionem habet quàm
K
F ad F H, &
componendo in hyperbola, & diuidendo in ellipſi G C ad C B
ſeu
rectangulum G C B ad quadratum B C minorem proportionẽ habebit quàm
K
H ad H F, ſeu quàm rectangulum K H F ad quadratum F H :
erat autem
quadratum
A C ad rectangulum G C B vt quadratum E H ad rectangulum K
H
F ;
igitur ex æquali, quadratum A C, ad quadratum C B minorem propor-
tionem
habet quàm quaàratum E H ad quadratum H F, &
ideo A C ad C

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