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Solids: Sphere

Document Reference: TN201309069 - Rev: 4.12 - Last Update: 26-03-2014 11:50 GMT - Downloaded: 27-May-2019 14:19 GMT

A sphere is perfectly round, composed with set of points that are all the same distance from the centre of the sphere. A ball is an example of a sphere.

The volume of a sphere is 2/3 that of a circumscribed cylinder (Archimedes).

Sphere

Enclosed Volume of a Sphere

Formula

Volume (V)=4×π×radius cubed
3
V=4π r3
3

The radius r is the radius of the cross section of the sphere.

Surface Area of a Sphere

Hemisphere Surface Area

A sphere has only one single curved surface area (face). A sphere has no edges.

Formula

Surface Area (A)=4×π×radius squared
A=4 π r2

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