What are flat 2-d objects with edges?

Flat 2-D objects with edges are known as polygons. These shapes are defined by straight line segments that connect at vertices, forming a closed figure. Common examples include triangles, quadrilaterals, pentagons, and hexagons, each classified based on the number of edges or sides they possess. Polygons can be regular, with all sides and angles equal, or irregular, with varying side lengths and angles.