Polygons by Amy Pihlainen

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Polygons by Amy Pihlainen

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Presentation transcript:

Polygons by Amy Pihlainen

Polygons The word polygon means “many angles” A two dimensional object A closed figure

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

Examples of Polygons

These are not Polygons

Terms: Side: One of the line segments that make up a polygon. Vertex: point where two sides meet.

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.

Terms continued

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

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

Examples of Regular Polygons

Names of Polygons Triangle: a three sided polygon Quadrilateral: a four sided polygon. A quadrilateral that is a regular polygon is called a square.

Names continued Pentagon: a five sided polygon Hexagon: a six sided polygon Heptagon: a seven sided polygon

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