# Area of a Hemisphere

## Description

A sphere is a perfectly round geometrical and circular object in three-dimensional space that resembles the shape of a completely round ball. A sphere is defined mathematically as the set of points that are all the same distance from a given point in three-dimensional space. This distance is the radius of the sphere, and the given point is the center of the sphere. Hemisphere is the half of a sphere. Any plane that includes the center of a sphere divides it into two equal hemispheres.

Area is the quantity that expresses the extent of a two-dimensional figure or shape, or planar lamina, in the plane. The area of a Hemisphere (the total surface area including the flat part) can be calculated by the radius of the sphere.

## Variables

A | area (m^{2}) |

π | pi |

r | radius (m) |