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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253215Conicor. Lib. VI. æqualem eße O V, eo quod in perallelogrammis Q I, & S K latera oppoſita ſunt
æqualia
, &
ipſæ ordinatæ E K O I; nec non M N, Q R æquales oſtenſæ ſunt:
Deinde producantur, B E, O I ad ſectionem in C, P; Et quia differentia qua-
dratorum
B Z, L X, ſeu T Z, ideſt rectangulum B T C æquale eſt differentiæ
11ex II.
lib
. I.
rectangulorum Z G F, &
X G F ſeu rectangulo ſub abſciſſarum differentia X Z,
&
latere recto G F. Simili modo rectangulum O V P æquale erit rectangulo ſub
abſciſſarum
differentia R I, &
latere recto G F: ſuntque rectangula contenta
ſub
X Z, G F, &
ſub R I, G F æqualia, propterea quod later a X Z, R I æqua-
lia
oſtenſa ſunt, &
latus rectum G F eſt commune; igitur rectangula B T C, &
O
V P æqualia ſunt;
ideoque vt T C ad V P, ita reciprocè erit O V ad B T.
Et primò quia diametri G Z, H K coincidunt, & parabolæ H D compræhendi-
tur
ab A G:
erit G Z maior quàm H K, ſeu quàm G I, & B Z maior quàm
E
K, &
L X quàm M N. Si verò B E, L M parallelæ ſunt alicui rectæ lineæ
H
Y diuidenti angulum G H K;
ergo Y Z, ſeu ei æqualis H K, vel G I minor
erit
, quàm G Z.
Eadem ratione G X maior erit, quàm G R; quare ordinatim
applicata
B Z maior erit, quàm O I, &
Z C maior, quàm I P; pariterque L
X
, ſeu T Z maior erit, quàm Q R, ſeu V I;
ideoque T C maior erit, quàm
V
P:
erat autem O V ad B T reciprocè, vt T C ad V P; ergo O V, ſeu ei æqua-
lis
S M maior erit, quàm B T:
ij verò addantur æquales L S, T E, quæ in
parallelogrammo
S T ſunt latera oppoſita, igitur L M, maior erit quàm B E.

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