Definition

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

Example

The architect designed a unique building shaped like a pentahedron.

Conversation

Have you ever seen a pentahedron before?

I think so, but I can't remember what it looks like.

It's a solid shape with five faces, pretty interesting!

Oh right, now I recall — it has a unique look to it.

Synonyms & Antonyms

Root Explanation

Pentahedron → It is formed from "penta-" (from Greek "pente", meaning five) and "hedron" (from Greek "hedra", meaning face or base). The word "pentahedron" refers to a solid figure with five faces.

Memory Tip

Think of 'five' ('penta-') and 'faces' ('hedron') to remember that a pentahedron is a shape with five faces.

Visually Confused Words