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Circumference of a Circle
The circumference of a unit circle is 2π, or about 6.28.
Contributed by:
Stephen Wolfram
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Circumference of a Circle
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http://demonstrations.wolfram.com/CircumferenceOfACircle/
Contributed by:
Stephen Wolfram
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Related Curriculum Standards
Common Core State Standards for Mathematics
7.G.B.4
HSG-GMD.A.1
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