Viviani, Vincenzo, De maximis et minimis, geometrica divinatio : in qvintvm Conicorvm Apollonii Pergaei

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COROLL.
HInc, data ratione maioris inæqualitatis, hoc eſt D E, ad E H, &
differentia A C inter duo s terminos ignotos A G, G C, qui de-
beant eſſe in data ratione, eruitur quomodo reperiantur ipſi termini A G,
G C.
Facta enim fuit vt D H differentia primorum, ad H E minorem ter-
minum, ita data differentia A C, ad aliam C G, &
reperti ſunt quæſiti
termini A G, G C, Nam ſtatim oſtenſum fuit eſſe A G ad G C, vt D E
ad E H.
THEOR. XII. PROP. XVII.
Si fuerit in angulo rectilineo quælibet applicata, à qua hinc
inde ab eius termino æqualia ſegmenta ſint abſciſſa, &
per v-
num diuiſionis punctum deſcribatur Hyperbole, cuius aſympto-
ti ſint latera dati anguli, ipſa per alterum punctum neceſſariò
tranſibit.
SIt in angulo A B C applicata quæcunque A C, quæ inæqualiter ſece-
tur in D, &
ſumatur C E æqualis A D. Dico ſi per punctum D de-
ſcribatur Hyperbole, cuius aſymptoti ſint B A, B C, ipſam omnino tran-
ſire per E.
Quod huiuſmodi Hyper-
162[Figure 162] bole tranſiens per D, alibi
ſecet applicatam A C, pa-
tet.
Nam ſi eam continge-
ret in D, eſſet A C æquali-
ter ſecta in D:
quod 113. ſecun-
di conic.
contra hypoteſim.
Secet er-
go in F;
& erit F C 228. ibid. lis A D, ſed eſt quoque E
C eidem A D ęqualis, qua-
re F C, E C ęquales erunt;
hoc eſt punctum F congruet
cum ipſo E;
quare Hyper-
bole D F, quæ in angulo aſymptotali A B C deſcribitur per D, omnino
tranſit per E.
Quod erat demonſtrandum.

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