# How to Calculate a Sphere?

A sphere is a perfectly round object, such as a soccer ball or pool ball. When calculating the volume of a sphere, you need to know the diameter. If you cannot measure the diameter, you can measure...
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http://www.ehow.com/how_8121192_calculate-sphere.html

## How to Calculate a Sector of a Sphere?

The volume of a sector of a sphere can be determined using a specific formula. This equation is the same whether the object is an open spherical sector or a spherical cone. In either case, the sphe...
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http://www.ehow.com/how_8147816_calculate-sector-sphere.html

## How to Calculate the Surface of a Sphere?

The surface area of a sphere is like its shell. Calculation of that shell is accomplished by the following equation: surface area = 4 * pi * radius^2. The radius is the measured distance from the s...
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http://www.ehow.com/how_8064659_calculate-surface-sphere.html

## How to Calculate the Volume of a Sphere?

Stuck on calculating the volume of a sphere? Here's how to do it.

http://www.wikihow.com/Calculate-the-Volume-of-a-Sphere

## How to Calculate Trigonometric Rings on a Sphere?

You can draw two kinds of rings on a sphere: great circles and small circles. Either kind defines a plane passing through the sphere. For great circles, this plane passes through the center of the ...
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http://www.ehow.com/how_7967767_calculate-trigonometric-rings-sphere.html