Apollonius <Pergaeus>; Lawson, John, The two books of Apollonius Pergaeus, concerning tangencies, as they have been restored by Franciscus Vieta and Marinus Ghetaldus : with a supplement to which is now added, a second supplement, being Mons. Fermat's Treatise on spherical tangencies

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68[iii]
DE SECTIONE DETERMINATA II.
HIS ſubjiciuntur libri duo de Sectione Determinatâ,
quas
etiam ad modum præcedentium unam pro-
poſitionem
dicere liceat, ſed disjunctam:
quæ hujuſ-
modi
eſt.
Datam rectam infinitam in uno puncto ſe-
care
, ita, ut è rectis interceptis inter illud &
puncta
in
illâ data, vel quadratum ex unâ, vel rectangulum
ex
duabus interceptis, datam habeat rationem, vel ad
contentum
ſub aliâ unâ interceptâ &
datá quâdum;
vel etiam ad contentum ſub duabus aliis interceptis:
idque
ad quam partem velis punctorum datorum.

Hujus
autem, quaſi bis disjunctæ, &
intricatos Dio-
riſmos
habentis, per plura neceſſario facta eſt demon-
ſtratio
.
Hanc autem dedit Apollonius communi methodo
tentamen
faciens, ac ſolis rectis lineis uſus, ad exemplum
ſecundi
libri Elementorum primorum Euclidis:
ac rur- ſus idem demonſtravit ingenioſe quidem, & magis ad
inſtitutionem
accomodate, per ſemicirculos.
Habet
1

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