# Basic Geometry

### Topics

## Introduction to :

To find the volume of a sphere, follow this simple formula (which took a brilliant ancient Greek mathematician named Archimedes years to derive):

## Volume of a Sphere = 4/3π x radius cubed** = 4/3πr**^{3}

^{3}

#### Example 1

The diameter of this sphere is 11.9 cm, so the radius is half of that, 5.95 cm. |

#### Example 2

You cut an orange in half and measure the radius to be 1.5 in. What is the volume of the orange half? |

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