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How do you do this problem
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How do you do this problem

How do you do this problem-example-1
User Carlos Paulino
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The answer is B, pi*r/2
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It is a square so each of the angles is 90 degrees (a quarter of 360). So, APD is a quarter of the circle circumference. A full circumference is 2*pi*r, so a quarter circumference is pi*r/2
User Rich Lowenberg
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