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Polygons by Amy Pihlainen

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Made up of three or more straight line segments. There are ... Octagon: an eight sided polygon. Decagon: a ten sided polygon. Dodecagon: a twelve sided polygon ... – PowerPoint PPT presentation

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Title: Polygons by Amy Pihlainen


1
Polygonsby Amy Pihlainen
2
Polygons
  • The word polygon means many angles
  • A two dimensional object
  • A closed figure

3
More about Polygons
  • Made up of three or more straight line segments
  • There are exactly two sides that meet at a vertex
  • The sides do not cross each other

4
Examples of Polygons
5
These are not Polygons
6
Terms
  • Side One of the line segments that make up a
    polygon.
  • Vertex point where two sides meet.

7
Terms continued
  • Interior angle an angle formed by two adjacent
    sides inside the polygon.
  • Exterior angle an angle formed by two adjacent
    sides outside the polygon.

8
Terms continued
9
Types of Polygons
  • Equiangular Polygon a polygon in which all of
    the angles are equal
  • Equilateral Polygon a polygon in which all of
    the sides are the same length

10
Types of Polygons continued
  • Regular Polygon a polygon where all the angles
    are equal and all of the sides are the same
    length. They are both equilateral and equiangular

11
Examples of Regular Polygons
12
Names of Polygons
  • Triangle a three sided polygon
  • Quadrilateral a four sided polygon. A
    quadrilateral that is a regular polygon is called
    a square.

13
Names continued
  • Pentagon a five sided polygon
  • Hexagon a six sided polygon
  • Heptagon a seven sided polygon

14
Names continued
  • Octagon an eight sided polygon
  • Decagon a ten sided polygon
  • Dodecagon a twelve sided polygon
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