Difference between revisions of "Polygon"

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(quadrilateral is generic term.)
(adding other four sided polygons)
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# As with the one-sided polygon, there is no such thing as a two-sided polygon.  (This would be two overlapping [[line segment]]s.)
 
# As with the one-sided polygon, there is no such thing as a two-sided polygon.  (This would be two overlapping [[line segment]]s.)
 
# [[Triangle]] - see [[isosceles triangle]], [[equilateral triangle]], [[right triangle]]
 
# [[Triangle]] - see [[isosceles triangle]], [[equilateral triangle]], [[right triangle]]
# [[Quadrilateral]]: See also [[square]] and [[rectangle]]
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# [[Quadrilateral]] - See also [[square]], [[rectangle]], [[rhombus]], and [[trapezoid]]
 
# [[pentagon (geometry)|Pentagon]]
 
# [[pentagon (geometry)|Pentagon]]
 
# [[Hexagon]] - the shape of a bee hive cell, also used in some board games
 
# [[Hexagon]] - the shape of a bee hive cell, also used in some board games

Revision as of 23:31, April 18, 2007

A polygon is a union of disjoint line segments that is path-connected.

Types, by number of sides.

  1. There is no such mathematical entity as a one sided polygon in a plane. (For three dimensional analogies, see Mobius strip and Klein bottle.)
  2. As with the one-sided polygon, there is no such thing as a two-sided polygon. (This would be two overlapping line segments.)
  3. Triangle - see isosceles triangle, equilateral triangle, right triangle
  4. Quadrilateral - See also square, rectangle, rhombus, and trapezoid
  5. Pentagon
  6. Hexagon - the shape of a bee hive cell, also used in some board games
  7. Heptagon - not commonly encountered in everyday life
  8. Octagon - used for stop signs in the U.S.