Sphere

round, rotationally symmetric shape of the 2D surface of a ball in 3D space
(Redirected from Spherical)

A sphere is a round, three-dimensional shape. All points on the edge of the sphere are at the same distance from the center. The distance from the center is called the radius of the sphere. A real-world sphere is called a globe if it is large (such as the Earth), and as a ball if it is small, like an association football.

A Sphere

Common things that have the shape of a sphere are basketballs, superballs, DragonBalls and playground balls. The Earth and the Sun are nearly spherical, meaning sphere-shaped.

A sphere is the three-dimensional analog of a circle.

Calculating measures of a sphere

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Surface area

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Using the circumference:  

Using the diameter:  

Using the radius:  

Using the volume:  

Circumference

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Using the surface area:  

Using the diameter:  

Using the radius:  

Using the volume:  

Diameter

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Using the surface area:  

Using the circumference:  

Using the radius:  

Using the volume:  

Radius

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Using the surface area:  

Using the circumference:  

Using the diameter:  

Using the volume:  

Volume

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Using the surface area:  

Using the circumference:  

Using the diameter:  

Using the radius:  

Equation of a sphere

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In Cartesian coordinates, the equation for a sphere with a center at   is as follows:

 

where   is the radius of the sphere.

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