MTH 232

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MTH 232

• Section 10.2
• Area and Perimeter

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Area

• The number of square units required to cover a
  region.
• Area is measured in square units (ft2, cm2, in2)

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Perimeter

• The distance around a region (found by adding up
  the lengths of the sides of the polygon).
• Perimeter is measured in regular (non-squared)
  units.

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Circles

• Because circles dont have sides, the geometric
  equivalent of perimeter is circumference

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More About Circles

• Circles, however, do have area. The definition of
  area for a circle is the same as the definition
  of area for a polygon, despite the fact that it
  is hard to visualize filling a circle with
  square units

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About Pi

• Pi is a greek letter that is used to represent
  the ratio of the circumference of a circle to its
  diameter

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Composite Areas