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22 April, 17:29

What's is the radius of a circle with a area of 3.21 square feet

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  1. 22 April, 21:23
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    approx 1 foot

    The area (A) of a circle = πr² (where r is the radius)

    thus r² = A/π ⇒ r = √ (A/π = √ (3.21/π) = 1.0108 ... ≈ 1 foot (to 1 dec. place)
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