Quadrilaterals & Polygons

• • Triangle - 3 sides
  • Quadrilateral - 4 sides
  • Pentagon - 5 sides
  • Hexagon - 6 sides
  • Heptagon - 7 sides
  • Octagon - 8 sides
  • Nonagon - 9 sides
  • Decagon - 10 sides
• Sum of interior angles of a polygon: (n-2) x 180º