522261v
Sit portio sphæræ , in qua
intelligatur figura ex conicis inscripta,
ut in
[Translation: Let there be a portion of the sphere , in which it is understood that the figure from cones is inscribed, as in the previous pages,
intelligatur figura ex conicis inscripta,
ut in
[Translation: Let there be a portion of the sphere , in which it is understood that the figure from cones is inscribed, as in the previous pages,
Intelligatur etiam conus
cuius altitudo , sit æqualis
perpendiculari a centro sphæræ
ad unum latus polygoni:
et basis circa diametrum ,
sit æqualis superficiei figuræ
compositæ ex conicis.
Dico
[Translation: It is also understood that the cone whose altitude is is equal to the perpendicular from the centre of the sphere to one side of the polygon; and the base around the diameter is equal to the surface of the figure composed from cones.
I say ]
cuius altitudo , sit æqualis
perpendiculari a centro sphæræ
ad unum latus polygoni:
et basis circa diametrum ,
sit æqualis superficiei figuræ
compositæ ex conicis.
Dico
[Translation: It is also understood that the cone whose altitude is is equal to the perpendicular from the centre of the sphere to one side of the polygon; and the base around the diameter is equal to the surface of the figure composed from cones.
I say ]