# Hemisphere Shape – Definition, Formula, Examples, Facts, FAQs

## What Is a Hemisphere Shape in Geometry?

A hemisphere is formed when a plane cuts a sphere in half. When a sphere is divided into two equal halves, each half is then called a hemisphere.

A sphere is a 3D round shaped solid. Each point on its surface is equidistant from the center.

So, what does a hemisphere look like? Take a look at the image shown below!

It has a flat circular base and a curved surface. Note that the radius of the hemisphere is equal to the radius of the sphere it is cut from.

In everyday life, we come across a variety of hemisphere-shaped objects. For instance, if we cut a perfectly round lemon or an orange in identical halves, we get two hemispheres.

## Hemisphere: Definition

A hemisphere is a geometric shape that is exactly half of a sphere. The prefix “hemi” means “half.”

## Properties of a Hemisphere

• The radius of the hemisphere is equal to the radius of the sphere.
• A hemisphere has a flat circular base and a curved surface.
• A hemisphere has no edges and no vertices, just like a sphere.
• A hemisphere is not a polyhedron since it has a circular base and one curved surface.
• A line segment that meets the two opposite points on the base of a hemisphere and passes through its center is said to have that object’s diameter.

## Volume of a Hemisphere

A hemisphere’s volume is defined as the 3D space occupied by it, it is expressed in cubic units.

The volume of sphere is calculated using the formula $V = \frac{4}{3} \pi r^{3}$

We know the hemisphere is simply half of the sphere. The volume of the hemisphere is also half the volume of the sphere.

Hemisphere Volume $= \frac{2}{3} \pi r^{3}$

where