Polygons

When line segments are connected in succession so that the end point of the first segment becomes the starting point of the next segment, the result is a polygonal chain. If the start and end points of the polygonal chain converge, a closed polygonal chain is formed.


Definitions related to polygons

  • A polygon is a part of a plane bounded by a closed, non-self-intersecting polygonal chain. 
  • The diagonal of a polygon connects two non-adjacent vertices. 
  • The angle of a polygon is the angle between two sides whose opening is inside the polygon. 

Polygons are named by listing the vertices of the polygon in order. A polygon can also be named by the number of vertices, angles, or sides in it. For example, a hexagon has 6 vertices, 6 angles, and 6 sides.