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12 December, 21:01

Min knows that Pi times r = 9.42 centimeters. What would she need to do to find the area?

She could multiply 9.42 by 2.

She could multiply 9.42 by Pi.

She could divide 9.42 by 2 to find the radius, then square the radius.

She could divide 9.42 by Pi to find the radius, then multiply 9.42 by the radius.

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  1. 12 December, 21:06
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    She could divide 9.42 by Pi to find the radius, then multiply 9.42 by the radius.

    (Last option)

    Step-by-step explanation:

    We need the formula for the area of a circle:

    A = πr²

    Remember r² = r * r

    So you could rewrite the formula like this:

    A = π * r * r

    If π * r = 9.42, then the area becomes:

    A = 9.42 * r

    "Then multiply 9.42 by the radius".

    To find "r", divide 9.42 by π.

    π * r = 9.42

    r = 9.42/π

    "Divide 9.42 by Pi to find the radius".
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