Definition

A shape that has ten sides and ten corners.

Example

The architect designed a building in the shape of a decagon.

Conversation

Have you ever heard of a decagon?

Yeah, it's that shape with ten sides, right?

Exactly! I was just reading about its properties.

That's cool! I love learning about different geometric shapes.

Synonyms & Antonyms

Root Explanation

Decagon → It is formed from "deca-" (from Greek "deka", meaning ten) and "gon" (from Greek "gonia", meaning angle). The word "decagon" refers to a shape that has ten angles or ten sides.

Memory Tip

Think of 'deca-' meaning ten and 'gon' meaning angle — a decagon is a shape with ten angles.

Visually Confused Words