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If the area of a circle is 16 mm2, what is the radius of the circle?

 Feb 6, 2019
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A = pi x radius squared

16 sqmm = 3.14 x r squared

r squared = 16 sqmm / 3.14 =  5.1 sqmm

r = square root of 5.1 sqmm = 2.26 mm

 Feb 6, 2019

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