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

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12399
PROBL. XXII. PROP. LVI.
Iungatur ED ſecãs
88[Figure 88] ABC in B, &
per E
concipiatur
116. huius. bi Hyperbole EN ſi-
milis
, &
concentrica
datę
ABC, cuius re-
ctum
ſit EG, quod ex
more
, ordinatim ap-
plicetur
diametro E
B
, &
cum dato recto
EF
, quod non ſit ma-
ius
E G, adſcribatur
ipſi
ABC ſimilis Hy,
perbole
HEK, cuius centrum ſit I;
erunt ergo Hyperbolæ EH, EN inter ſe
ſimiles
, quare vt rectum EF, ad rectum EG, ita ſemi-tranſuerſum EI ad ſe-
mi-tranſuerſum
ED, &
ponitur EF non maius EG, quare EI non maius erit
ED
, ſiue punctum I centrum ſectionis EH, vel cadet in ipſo D, vel infra D
centrum
ABC, quapropter ipſa EH datæ ABC erit inſcripta.
2248. h.
Ampliùs: dico ipſam EH eſſe _MAXIMAM_ quæſitam. Nam quælibet alia
per
E adſcripta, cum eodem recto EF, ſed cum ſemi-tranſuerſo, quod ma-
ius
ſit ipſo EI, eſt minor ſectione EH, quæ verò cum eodem recto EF, 333. Co-
roll
. 19. h.
cum ſemi-tranſuerſo EO, quod minus ſit EI, qualis ponatur eſſe ſectio EN,
eſt
quidem maior eadem EH, ſed omnino ſecat datam ABC:
quoniam 44ibidem. ctis DL, IM aſymptotis ſectionum ABC, EH, ipſæ erunt inter ſe parallelæ: 5548. h. ductaque OP aſymptoto ſectionis EN, ipſa OP ſecabit IM infra 66Coroll.
36
. huius.
tem, ex communi ſectionum vertice E, &
producta alteri æquidiſtanti

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