Add Yahoo as a preferred source to see more of our stories on Google. Celebrate Pi Day and read about how this number pops up across math and science on our special Pi Day page. For more than two ...

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WASHINGTON (WASHINGTON POST) - It begins with 3.14 and goes on forever. But the value of Pi, the ratio of a circle's circumference to its diameter, has new meaning on this Pi Day. Ms Emma Haruka Iwao, ...