Polygons

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Polygons

• Section 1-6

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• polygon a many-sided figure
• convex polygon a polygon such that no line
  containing a side of the polygon contains a point
  in the interior of the polygon.

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• concave

convex
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• 3 sides triangle
• 4 sides quadrilateral
• 5 sides pentagon
• 6 sides hexagon
• 8 sides octagon
• 10 sides decagon
• n sides n-gon

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• diagonal a segment joining 2 nonconsecutive
  vertices of the polygon
• When referring to a polygon, list its consecutive
  vertices in order.

B
A
F
C
E
D
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Theorem 2-13

• The sum of the measures of the angles of a convex
  polygon with n sides is

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Theorem 2-14

• The sum of the measures of the exterior angles of
  any convex polygon, one angle at each vertex is
  360.

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• regular polygon a polygon that is both
  equiangular and equilateral

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Joke Time

• Where do math teachers go on vacation?
• To Times Square

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• Why did the foal cough?
• Because he was a little horse!