math

what is the exact area of a circle with a diameter of 15 inches?

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asked by jenna
  1. radius = 15/2
    area = pi r^2 = pi (225/4)

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    posted by Damon
  2. so its 225pi sq. in?

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    posted by jenna
  3. exact? One cannot write down exactly irrational numbers, such as PI.

    The exact answer is 225/4 * PI

  4. pi r^2 = pi D^2/4 = area of circle

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    posted by Damon

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