Definition

A three-dimensional shape that has twenty flat surfaces, known as faces, and is a type of polyhedron.

Example

The architect designed a building in the shape of an icosahedron to create a unique look.

Conversation

Have you ever seen an icosahedron in person?

No, I haven't, but I've heard they look really cool!

Yeah, they have 20 faces, which is quite unique for a shape.

That sounds fascinating! I would love to check one out sometime.

Synonyms & Antonyms

Root Explanation

Icosahedron is formed from "icosa-" (from Greek "eikosi", meaning twenty) and "hedron" (from Greek "hedra", meaning face or base). The word describes a three-dimensional shape with twenty faces.

Memory Tip

Think of 'twenty' ('icosa-') faces ('hedron') to remember that an icosahedron is a shape with twenty faces.

Visually Confused Words