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It means the radius of a circle multiplied by itself, times pi.

It gives you the area of a circle.

Say the radius was 5.

5 squared, or 5x5 = 25.

25x3.14 (pi rounded to 2 decimal places because it goes on so long, 3.14159.....)

=78.5

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โˆ™ 2009-12-16 21:15:02
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Q: What does pi r squared equal?
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