Angeli, Stefano degli, Miscellaneum hyperbolicum et parabolicum : in quo praecipue agitur de centris grauitatis hyperbolae, partium eiusdem, atque nonnullorum solidorum, de quibus nunquam geometria locuta est, parabola nouiter quadratur dupliciter, ducuntur infinitarum parabolarum tangentes, assignantur maxima inscriptibilia, minimaque circumscriptibilia infinitis parabolis, conoidibus ac semifusis parabolicis aliaque geometrica noua exponuntur scitu digna

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211199 Non ergo KHC, eſt minimum, ſed I G C. Quod
&
c.
SCHOLIV M.
Cum autem in propoſit. 54. aſſignatus ſit modus
reperiendi triangulum maximum E F C, fuit conſe-
quenter expoſitus etiam modus reperiendi triangu-
lum minimum G I C.
Inſuper notetur, triangulum minimum circum-
ſcriptum parabolæ, æquale eſſe triangulo minimo
circumſcripto figuræ conſtante ex duabus ſemipara-
bolis ſupra expoſitis.
Triangulum enim GIC, du-
plicatum ad partes G C, eſt æquale eidem G I C,
duplicato ad partes IC.
PROPOSITIO LXIII.
Conus minimus circum ſcriptus cuilibet infinitorum conoìdeo-
rum vel ſemifuſorum par abolicorum, eſt ille, qui tangit
baſim maximi coni in illis ſolidis inſcripti.
SEd ſupponamus conum ex triangulo EFC, eſſe
maximum inſcriptibilium intra conoides ex ſe-
miparabola A B C, circa B C, &
conum ex triangulo
G C, tangere baſim coniinſcripti.
Dico conum ex
triangulo G I C, eſſe minimum circumſcriptibilium
conoidi.
Si non, ſit minimus ille, qui oritur ex trian-
gulo H k C, &
ducta L E M, parallela KH,

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