Polygon classification is the process of categorizing polygons based on their properties, such as the number of sides and angles. Polygons can be classified as regular or irregular. Regular polygons have all sides and angles equal, like a square or equilateral triangle, while irregular polygons have sides and angles of different lengths and measures. Another way to classify polygons is by the number of sides they have. For example, a triangle has three sides, a quadrilateral has four sides, and a pentagon has five sides. This classification helps in understanding the geometric properties and applications of different polygons in mathematics and design.