Casati, Paolo, Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae

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1qui eſt complementum anguli obſeruati
DAB ad duos rectos, inueniri poteſt latus
AC quæſita terræ ſemidiameter.
At non vacat montem conſcendere? alia

ſuppetit via, qua leuiori labore propoſitum
aſſequamur.
Sit nota altitudo IG, vnde vi­
deatur locus aliquis in ſuperficie terræ F: ob­
ſerueturque angulus IGF.
Quod ſi diſtantia
32[Figure 32]
GF iam nota non
fuerit, ex tertio
quopiam loco eą
obſeruetur, inue­
niaturque
iuxta Tri­
gonometriæ præ­
cepta.
His com­
paratis producatur
GI per terræ cen­
trum T vſquę
in O, vt IO ſit
terræ diameter: ex
F cadat in dia­
metrum perpendicularis FC.
Quoniam̨
igitur in triangulo GCF rectangulo datur hy­
pothenuſa GF, & angulus CGF, inueniantur
reliqua latera FC, CG.
Auferatur autem
IG data altitudo ex GC, & remanet IC.

Quia verò FC à puncto peripheriæ F cadit
perpendicularis in diametrum IO, eſt me­

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