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. 

Regular and irregular decagons

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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