A Pentagon is a five sided polygon.
There are two types of pentagon.
One is the regular which all angles and sides are equal
The other is an irregular pentagon, which has different lengths of sides and different angles.
However all pentagons must have an angle sum of 540 degrees to qualify it as a pentagon.
So in answer to the question, some pentagons are irregular polygons while others are not.
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A pentagon can be regular or irregular.
Any polygon can be regular or irregular. "Regular" means all of its sides have the same length. Your pentagon is regular if all of its five sides have the same length. If not, then it's an irregular pentagon.
A 5 sided pentagon can be a regular or an irregular polygon.
A 5 sided pentagon can be a regular or an irregular polygon.
== == A regular pentagon is a polygon that has five sides