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Yesterday, 19:53

The area of a circle (A) is given by the formula A=pi*r2

where r is the circle's radius. The formula to find r is. If and, r is centimeters.

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  1. Yesterday, 21:49
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    For this case what you must do is to determine the value of r of the given equation:

    A = pi * r ^ 2.

    Clearing the value of r we have:

    r = root (A / pi)

    Note that r has two roots:

    r1: = + root (A / pi)

    r2: = - root (A / pi)

    In this case we must ignore the negative root.

    Answer:

    The formula to find r is

    r = root (A / pi)
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