**Chapter 15 of class 6 shows “Polygon”, a polygon is any 2-dimensional shape formed with straight lines. Triangles, quadrilaterals, pentagons, and hexagons are all examples of polygons. The name tells you how many sides the shape has. For example, a triangle has three sides, and a quadrilateral has four sides. A simple closed figure composed of three or more line segments is called a Polygon. Basic topics which are included in this Chapter are a straight line, curve, closed figures, open figures, sides, vertices and diagonals. There are two types of polygons.**

Regular polygons which have equal angles and sides. Irregular polygons which do not have equal angles and sides. Chairs, television, tiles are examples of polygons used in daily life.