POLYGONS

1
POLYGONS

• Polygon
• - a 3 or more sided closed figure

2
POLYGONS
3 - 4 - 5 - 6 - 7 - 8 -
Triangle Quadrilateral Pentagon
Hexagon Heptagon Octagon
3

• 9 -
• 10 -
• 11 -
• 12 -
• n -

• Nonagon
• Decagon
• Hendecagon
• Dodecagon
• n-gon

4
Area of Polygons

• Area - space inside
• Area is always measured in square units (A24
  units squared or 24 square units)
• Congruent figures have congruent areas.

5

• A bh
• h is the perpendicular distance between the bases
  
• A bh
• A s2 or bh
• 1/2bh

• Parallelogram
• Rectangle
• Square
• Triangle -

6

• Trapezoid
• Rhombus
• Circle -

• ½ h(d1 d2)
• ½d1d2
• ?r2

7

• Regular Polygons - A1/2Pa
• P - perimeter
• a - apothem
• -a segment from the center perpendicular to a
  side.