# What is a decagon? Definition and examples

A decagon is polygon with 10 sides and 10 angles. A decagon can either be regular or irregular.

The name came from the Greek prefix deca meaning 10 and the Greek suffix gon meaning sides or angles.

## Types of decagons

The two types of decagons are regular decagon and irregular decagon.

In a regular decagon, all sides are equal and all angles have equal measures.

In an irregular decagon, at least one side has a different length or at least one angle has a different measure.

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