In geometry, a polyhedron is a three-dimensional object with flat polygonal faces, sharp corners, and straight edges. Each side is a flat surface and is without any curved surfaces. The word comes from the Greek ‘poly’ (stem of many) + ‘hedron’ (face). So, a polyhedron means ‘many-faced geometric shape.’
Examples Of A Polyhedron
A polyhedron features identical faces. Here are some examples of a polyhedron noticeable in everyday life.
- Pyramid
- Football
- Prism
- House
- Brick
What Is Not A Polyhedron?
A polyhedron does not feature contain gaps between the edges or vertices. Here are some examples of shapes that aren’t polyhedrons.
- Cone
- Sphere
- Cylinders
- Coffee Mug
What Is A Regular Polyhedron?
A regular polyhedron is where all faces of an object or shape are a regular polygon. Here are some examples of common polyhedron shapes.
- Regular tetrahedron
- Cube
- Regular octahedron
- Regular dodecagon
- Regular icosahedron
