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3 February, 16:00

Find the area of a circle with a diameter of 4.

Either enter an exact answer in terms of it or use 3.14 for IT and enter your answer as a decimal.

Answers (1)
  1. 3 February, 16:40
    The formula for area of a circle is (pi) * radius^2

    Radius is half of diameter so the radius is 2.

    2 squared is 4, then multiply by pi to get an answer of 4 (pi) or 12.56.
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