Best Pi Day Activities for the Classroom
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Swiss researchers have calculated pi to 62.8 trillion digits – and it's both useless and fascinating
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Pi
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Value of Pi (π) in Decimal
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5 Ways to Calculate Pi - wikiHow
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Swiss researchers calculate pi to new record of 62.8tn figures | Mathematics | The Guardian
Pi Formula: Concept, Interesting Facts, Solved Examples
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New mathematical record: what's the point of calculating pi? | Mathematics | The Guardian
NOVA - Official Website | Approximating Pi
Approximations of π - Wikipedia
