An irregular polygon is a type of polygon that does not have all sides and angles equal. Unlike regular polygons, such as equilateral triangles or squares, irregular polygons can have varying lengths and angles. This means that the shape can look quite different from one irregular polygon to another, making them unique in appearance. Examples of irregular polygons include shapes like trapezoids and pentagons that do not have equal sides or angles. Irregular polygons can have any number of sides, and their complexity can vary widely, allowing for a diverse range of geometric forms.