Fundamental polygon

See en:Fundamental polygon.

• 
  Fundamental polygon of the 2-sphere: aa^-1
• 
  Fundamental polygon of the projective plane: aa
• 
  Fundamental polygon of the torus: aba^-1b^-1
• 
  Fundamental polygon of the Klein bottle: aba^-1b

• 
  Sphere
• 
  Projective plane
• 
  Torus
• 
  Klein bottle

Related

• 
  Möbius strip
• 
  Cylinder