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Sphere - area and volume

 

 

Sphere

A = 4 πr2

V = 4/3 πr3

A = Area

V = volume

d = diameter

r = radius

WHAT IS IT ?

A sphere is a three-dimensional geometric shape where all points on the surface are equidistant from a fixed point called the center.

The properties of a sphere include:

  • Radius (r): The distance from the center to any point on the surface.
  • Diameter (d): Twice the length of the radius, passing through the center of the sphere.
  • Circumference: The distance around the widest part of the sphere, which is a great circle.

 



 

 

 

CALCULATION:

Enter unit e.g.: inch

Enter radius

Enter the number of decimal places

EXAMPLE:

The radius of the sphere is, for example, 8 cm. Thus, r = 8.

area of the sphere:

We use the formula

A = 4πr²

thus

A = 4 * 3.14 * 8 * 8

A = 803.84 cm²

volume of the sphere:

We use the formula

V = 4/3πr³

thus

V = 4/3 * 3.14 * 8 * 8 * 8

V = 2144.66 cm³

 



 

 



 

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