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A point  P is randomly selected from the square region with vertices at $(\pm 1, \pm 1)$. What is the probability that P is within one unit of the origin? Express your answer as a common fraction in terms of pi.

 Jun 5, 2021
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$\frac{1^2 \pi}{(1 - (-1))(1-(-1))} = \frac{\pi}{4}$


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