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Simple Math

 
 
 
Volume of a Sphere

FitnessMath.com is a fun site for learning about math that you can use for fitness, workouts and health promotion.

Google's calculator works for volume of a sphere, which is 4/3 * Pi * radius^3.

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What is the area of a circle given the radius of the circle?
In the expression below replace the '3' with the length of your circle's radius:

If you type in the unit, such as feet or meters (in parentheses with the number), Google gives the answer in meters.



What is the area of a circle given the diameter of the circle?
In the expression below replace the '6' with the length of your circle's diameter:

Pi is a mathematical constant that is an irrational real number, which approximately equals 3.1415. Pi is the ratio of a circle's circumference to its diameter. Pi is also known as Archimedes' Constant -- not to be confused with Archimedes' Number.

Pi = circumference/diameter

See also Pi on Wikipedia

 

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*Some calculations may not be appropriate for certain individuals. This site is intended for use as an educational tool, not a clinical tool. Always check with your physician before starting an exercise program.

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