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23 August, 22:25

Use the formula for the area of a circle to solve for the radius of the circle if the area is 78.5cm^2

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  1. 23 August, 23:07
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    Area = PI * radius^2

    radius = Sq Root (Area / PI)

    radius = Sq Root (78.5 / PI)

    radius = Sq Root (24.9873260654)

    radius = 4.9987

    radius = 5 (rounded)
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