Definition

A three-dimensional shape that has two flat surfaces or faces.

Example

The dihedron is a simple geometric shape used in various mathematical contexts.

Conversation

Have you ever heard of a dihedron?

No, what's that?

It's a type of polyhedron that only has two faces.

That sounds interesting! I didn't know there were shapes like that.

Synonyms & Antonyms

Root Explanation

Dihedron is formed from "di-" (meaning two) and "hedron" (from Greek "hedra", meaning face or base). The word refers to a geometric shape with two faces.

Memory Tip

Think of 'two' ('di-') faces ('hedron') to remember that a dihedron is a shape with two faces.

Visually Confused Words