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26 January, 19:14

What is the radius of 81π square inches

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  1. 26 January, 21:41
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    It is 9 inches because the formula for the area of a circle is πr2 where the r represents the radius of the circle

    The pi can be canceled out =

    πr2 and 81 π leaving with

    R2 and 81

    The r2 represents a square number. So square root 81 and you would result in 9 as your answer
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