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We call it ball center O and lightning R the set of points in space whose distance to the center is less than or equal to radius R.

Considering the complete rotation of a semicircle around an axis and, the sphere is the solid generated by this rotation. Thus it is bounded by a spherical surface and formed by all points belonging to that surface and to its interior. ## Volume

The volume of the ray sphere R It is given by: ## Spherical surface

The spherical center surface O and lightning R is the set of points in space whose distance to point O is equal to the radius R.

If we consider the complete rotation of a semicircle around its diameter, the spherical surface is the result of this rotation. The spherical surface area is given by: Next: Sphere Parts