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If we cut a sphere with a plane or some planes, we obtain different spherical figures and also we obtain different regions on the spherical surface:

*SPHERICAL SPINDLE*: it is the part of the spherical surface that it is between two maximum circumferences. Its area we can calculate as:

Area(spindle)= How can you deduce this formule?

*SPHERICAL WEDGE*: it is the part of sphere that it is between two maximum cirles which have common diameters and also the corresponding spherical spindle.Its volume we can calculate as::

Volume(wedge)= How can you deduce this formule?

*SPHERICAL SKULL-CAP*: It is the part of the spherical surface that it is between a plane which is perpendicular to the axis of the sphere and its pole. Its area we can calculate as:

Area(skull-cap)= How can you deduce this formule?

*SPHERICAL SEGMENT OF A BASE*: it is the part of spere that is limited by a spherical skull-cap and the plane which cuts al sphere. Its volumen we can calculate as: