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

QVoniam in hyperbola differentia quadratorum ex axi A C, & ex axi Q
1112. huius. R æqualis eſt differentiæ inter quadratum I L à quadrato eius coniugatæ
N O; eſtque Q R media proportionalis inter ſiguræ latera A C, &
2216. lib. 1. A F; ergo rectangulum C A F ſub extremis contentum æquale eſt quadrato in-
termediæ Q R: Et propterea differentia inter quadratum A C, & rectangu-
lum C A F æqualis erit differentiæ inter quadratum A C à quadrato Q R.

386[Figure 386] pari ratione erit differentia quadrati I L à rectangulo L I P æqualis differen-
tiæ quadrati I L à quadrato N O; & propterea in hyperbole differentia qua-
drati axis A C à rectangulo ſub figuræ lateribus contentum C A F æqualis
eſt differentiæ quadrati diametri I L à rectangulo L I P ſub lateribus figuræ
eius.

Notæ in Propoſit. XXX.

QVoniam in ellipſi quadratorum ex A C, & ex Q R ſumma æqualis eſt
33Prop. 13.
huius.
ex 15.
lib. 1. ſummæ quadratorum ex I L, & ex N O: eſtque rectangulum C A F
æquale quadrato Q R, & rectangulum L I P æquale quadrato N O
(vt in præcedenti nota dictum eſt) igitur in ellipſi quadratum axis A C, &
rectangulum C A F ſub eius lateribus cõtentum ſimul ſumpta æqualia ſunt qua-
drato ex I L cum rectangulo figuræ eius L I P.

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