Things To Know About Pi Day
By Katie Lepi
Happy Pi Day, everyone!
I don’t know about you, but I always enjoy a good date that has significance. Dates like 11-11-11, 10-01-10 and 7-9-79 are fun, but March 14th always tops my list! Maybe I’m a geek. Maybe I just like pie.
Either way, today is Pi day! We’re celebrating with the handy infographic below, which offers us a whole bunch of fun facts about Pi. Get ready – there’s lots here that you probably don’t already know (unless you are a math teacher, and then you have an unfair advantage!) Keep reading to learn more.
Visualizing Pi
- The decimal representation of pi has been computed to more than a trillion digits
- Pi can be estimated by dividing the circumference of any circle by its diameter
- Pi has about 64 billion digits
- If you recited them without stopping, it would take you about 133 years
- The world record holder memorized over 44,000 digits of pi (which took over 9 hours to recite)
- Ancient mathematicians knew that the ratio of circumference to diameter was slightly more than 3
- The earliest reference to pi is an Egyptian papyrus dating from about 1650BC by a scribe named Ahmes
- Pi was discovered by Archimedes (He was Greek)
- Archimedes took a polygon with 96 sides and inscribed a circle inside the polygon to visualize pi
- All of the digits of pi can never be fully known
- A professor at the University of Tokyo took 116 hours to compute 6,442, 450,000 decimals of pi
- The decimal representation of pi truncated to 11 digits is accurate enough to estimate the circumference of any circle that fits inside the earth within an error of less than 1 millimeter
- There is no 0 in the first 31 digits of pi
- At 39 digits, pi can estimate the circumference of any circle within the observable universe with precision comparable to the radius of a hydrogen atom
- The Feynman point is at position 763, where there are six 9s in a row
- No simple base 10 pattern in the digits of pi has ever been found
- 2 pi in radians form is 360 degrees
- Thus, pi radians is 180 degrees, and 1/2 pi radians is 90 degrees
- The first to use pi definitely to stand for the ratio of circumference to diameter was English writer William Jones
- The symbol for pi entered into use in 1737
Post Source: http://www.edudemic.com/facts-pi-pi-day/
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