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Types of Polygons

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Types of Polygons and Naming Polygons

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Types of Polygons

  1. 1. Types of Polygons
  2. 2. 1. Simple and complex polygons • A simple polygon has only one boundary and the sides do not cross each other, otherwise it is a complex polygon.
  3. 3. • Simple polygon • Complex polygon
  4. 4. 2. Concave and convex polygons • A convex polygon has no internal angle more than 180º and if there are any internal angles greater than a straight angle, then it is a concave polygon.
  5. 5. • Concave polygon • Convex polygon
  6. 6. 3. Regular and Irregular polygons • Regular polygon is one whose sides are all equal and whose interior angles are all congruent. Thus, a regular polygon is both equilateral and equiangular. If, otherwise, the polygon is said to be irregular polygon.
  7. 7. • Regular polygon
  8. 8. • Irregular polygon
  9. 9. • Irregular polygon
  10. 10. NAMES OF POLYGONS
  11. 11. • Polygons are named or classified according to their number of sides. A polygon with n sides is called n-gon.
  12. 12. n (sides) Polygon 1 2 Digon Henagon 3 Triangle, trigon 4 Quadrilateral, tetragon 5 Pentagon 6 Hexagon 7 Heptagon 8 9 Octagon Nonagon, enneagon 10 Decagon
  13. 13. Sides Polygon 11 Hendecagon 12 Didecagon 13 Tridecagon 14 Tetradecagon 15 Pentadecagon 16 Hexadecagon 17 Heptadecagon 18 Octadecagon 19 Enneadecagon 20 Icosagon
  14. 14. • To construct a polygon’s name, combine the corresponding prefix and suffix. Example: Construct the name for 28 and 46 sided polygons. Sides Prefix 20 Icosa Sides Suffix 8 Octagon Icosaoctagon
  15. 15. Sides Prefix Sides Suffix 40 tetracon 6 hexagon Tetraconhexagon

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