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Posted by **-Untamed-** on Tuesday, October 4, 2011 at 10:11pm.

I really dont get how to solve this, but the answer is supposed to somehow be 48V2 cm

- Calculus -
**Reiny**, Tuesday, October 4, 2011 at 10:37pmMake a sketch.

Did you notice that the diameter of the circle is the diagonal of the square?

area of circle = πr^2

πr^2 = 144π

r^2 = 144

r = 12 , so the diameter = 24

let each side of the square be x

then x^2 + x^2 = 24^2

2x^2 = 576

x^2 = 288

x = √288 = 12√2

perimeter = 4x = 4(12√2) = 48√2

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