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What to know about pi on Pi Day

Summary by Ground News
Pi Day occurs on March 14, because the date is written as 3/14 in the United States. Pi is the ratio of the circumference of a circle to its diameter, or approximately 3.14. The mathematical concept of pi has been around for thousands of years, but it started to be known by the Greek letter only in the 1700s.

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What to know about pi on Pi Day

If you've been using Pi Day as an excuse to just eat pie, that's just peachy (or apple or chocolate cream). But there's so much more to know about pi.

·Canada
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What to know about pi on Pi Day

Here's why we care about pi and its day of celebration, which is March 14.

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What to know about pi on Pi Day

Here's why we care about pi and its day of celebration, which is March 14.

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What to know about pi on Pi Day

Here's why we care about pi and its day of celebration, which is March 14.

·Salem, United States
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What to know about pi on Pi Day

Here's why we care about pi and its day of celebration, which is March 14.

·Lancaster, United States
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What to know about pi on Pi Day

Here's why we care about pi and its day of celebration, which is March 14.

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CNN broke the news in Atlanta, United States on Tuesday, March 14, 2023.
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