Today is March 14th, 201, and it is Pi Day! The letter Pi is the sixteenth letter of the Greek alphabet, but the number Pi is the ratio of the circumference of a circle to its diameter. Pi is an irrational number, one that never repeats and never ends - so usually we just abbreviate it to3.14, which is why we celebrate this mathematical constant on the fourteenth day of the third month!
Today’s “What Day Is It?” episode is supported by Tax Act - go over to https://thetalkinggeek.com/taxact to start filing your federal and even state tax return now.
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- 发布时间2018年3月15日 UTC 03:01
- 长度1 分钟
- 分级儿童适宜