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# Title: De Locis Solidis Secunda Divinatio Geometrica (shelfmark Leibn. Marg. 151)
# Folio 36, page id 898203430:0064
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VINCENTIL VIVTANI PRO LOCIS.
P R OP OSITIO XXI.
N quacunque Coni-sectione, vel Circulo. Si latera-
les contincentes cujuslibet trianculi sectioni circunseri-
pri in directum cum ejus semibasibus verinque exten-
dantur, atque extensarum termini cum trianculi verti-
ce rectis inneantur; diaconalis, quae inneit punctum
medium basis ejusdem trianguli, (5 occursum verticalis
tansentis cum ona lateralium, si producatur; sibi pro-
ximae juncentium occurret; sed in Circulo reliquae iun-
sentium aequidistabit.
In Parabola vero, (5 Fyperbola, atque Fllipsi oblonca
ipsi reliquae imneentium occurret ad partes Sectioni Con-
trarias.
At in FErperbola, occurret inter verticales tancentes Se-
ctionum oppositarum.
Et in prolata Fllipsi ad partes centri, ac oltra vertica-
iem tancentem priori oppositam.
Si vero ipsa diasonalis producatur ad partes Sectionis ver-
tici oppositas, haec, in Parabola, reliqua rancentium
lateracium aequidistabit.
Et in EEyperbola ab ea semper maris remonebitur (nam
ad partes verticis simul occurrent).
Si tandem ab occursibus ejusdem diaconalis cum veraque
junctarum ducantur ad productum axem ordinatae,
punctum bisecans seementum ab ipsis abscissum cadit
(in Parabola, in Hyperbola. (5 Ellipsi oblonca) inter
verticem Trianculi circunscripti, Co ordinatam a Se-
ctionis vertice remotiorem.
Sed, in FIrperbola, inter centrum Sectionis, (5 ordina-
tam vertici propiorem.
Et in Fllipsi prolata, inter Sectionis centrum; C9 ordi-
natam vertiei remotiorem.
Edo