Hemisphere:

A hemisphere is a half of a sphere, which is a three-dimensional geometric figure that is perfectly round and symmetrical. It is formed by rotating a semicircle around its diameter, resulting in two regions that are mirror images of each other.

Types of Hemispheres:

• Northern Hemisphere: The half of the sphere that lies north of the equator.
• Southern Hemisphere: The half of the sphere that lies south of the equator.
• Eastern Hemisphere: The half of the sphere that lies east of the prime meridian.
• Western Hemisphere: The half of the sphere that lies west of the prime meridian.

Properties of Hemispheres:

• A hemisphere has a curved surface that gives it a dome-like shape.
• Its base is a circle, which can be referred to as the equatorial circle.
• The equatorial circle divides the hemisphere into two equal halves.
• The curved surface of a hemisphere is also called a convex surface.
• The topmost point of a hemisphere is known as the vertex or apex.

Applications of Hemispheres:

Hemispheres have various practical uses and can be found in numerous objects and systems. Some common applications include:

• In architecture, domes and certain roof designs are based on hemispherical shapes.
• Hemispheres are used in the design of containers, such as bowls and spherical storage tanks.
• Globes representing the Earth use hemispheres to depict the Northern and Southern Hemispheres.
• In astronomy, celestial bodies like planets and moons can be considered as hemispheres.