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# Title: Methodus Figurarum Lineis Rectis & Curvis Comprehensarum Quadraturas Determinandi (shelfmarks Leibn. Marg. 135, Stück 1; Leibn. Marg. 135)
# Folio 35, page id 1025220307:0043
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axem AD, Ed sa ADL. K, ut Circumterencia
loc etiam unum est ex innumeris a plactalis
lcorca tuscredeu D. Ilaaci BarrOW.
Circuli ad Cuum radium.
e 1d0
Superficiem Sphaerae determinare.
IT AMB Semicirculus à cujus rocatione
daca (phaera producitur: a delioncer ra-
PIS. 18.
dium e c circumterentiam cujuslibet circuli; _ (IE
AB (diameter Semicirculi AMB) = 2d. jam quo-
niam omnes linex Circulo perpendiculares MP per-
veniume ad Circuli centrum P; ideo Crit RZ L pa-
rallello graminum rectangulum cujus longitudo dia-
Meter AB _ alticudo AIL = d radius Semicirculi
AMB; unde AL = 2d; (per liceram subiqi de
Cigno superticiem Curvam;) ideo per Theorem ter
d2c
EIUM 5. 2d :: c. r. unde 5 = =; vel ponendo -
p = d erit 5 = 2dc; aC propterea Sciperticies Sphaerae
aequatur rectansulo cujus Longitudo est Circumteren-
cia e Lacicudo Diameter Circuli in Sphaera maximi.
Nocatu dienum arbicror hinc conlequi omnium
TI