College students, rocket scientists and math enthusiasts around the world are celebrating Pi Day. The holiday on March 14 — or 3/14 — correlates to the first three digits of the infinite number. It’s also Albert Einstein’s birthday, making the pie eaten at Pi Day gatherings all the sweeter. Pi is a mathematical constant that expresses the ratio of a circle’s circumference to its diameter. It is part of many formulas useful in physics, astronomy, engineering and other fields, dating back thousands of years to ancient Egypt and Babylon. Across the country, many events now take place on college campuses. College students, rocket scientists and math enthusiasts around the world are celebrating Pi Day. The holiday on March 14 — or 3/14 — correlates to the first three digits of the infinite number. It’s also Albert Einstein’s birthday, making the pie eaten at Pi Day gatherings all the sweeter. Pi is a mathematical constant that expresses the ratio of a circle’s circumference to its diameter. It is part of many formulas useful in physics, astronomy, engineering and other fields, dating back thousands of years to ancient Egypt and Babylon. Across the country, many events now take place on college campuses. AP Technology and Science
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