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19 May, 09:11

What is the exact area of a circle with a diameter of 18 feet using pi

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  1. 19 May, 10:39
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    A = 81 pi ft^2

    Step-by-step explanation:

    The area of a circle is given by

    A = pi r^2

    r is d/2

    r = 18/2

    r = 9

    We need to leave pi as pi since we are asked for the exact answer

    A = pi 9^2

    A = 81 pi ft^2
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