Pi Day Celebration. Happy Pi Day "Probably no symbol in mathematics has evoked as much mystery,...
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Transcript of Pi Day Celebration. Happy Pi Day "Probably no symbol in mathematics has evoked as much mystery,...
Happy Pi Day
"Probably no symbol in mathematics has evoked as much mystery, romanticism, misconception and
human interest as the number pi”
Blatner, David. The Joy of Pi. Walker Publishing Company, Inc. New York, 1997
π=3.1415 and tomorrow is 3/14/15
A Brief History of Pi
Evidence of a fascination with π dates back to 2500 B.C.
The ratio of the perimeter of the Great Pyramid of Giza to the height of the pyramid is
EXACTLY 2π
Archimedes of Syracuse 287-212 B.C.
Beginnings of an approximation of Pi
3.1408<π<3.14285
Using the ratio of the area of a polygon
circumscribed to the ratio of a polygon
inscribed in a circle, Archimedes
approximated Pi using a 96 sided polygon.
This method was used a second time by a Chinese Mathematician, Zhu Chongzhi, 600 years later. Chongzhi approximated Pi with a 12,288 sided polygon!
Why π?
The pi symbol was taken from the Greek word for Perimeter
The symbol was first used in 1707 by William Jones, then
Later popularized by Leonhard Euler in 1737
October 19, 2011
Shigeru Kondo approximated Pi to 10 trillion digits using a super computer,
setting the record for the longest approximation of Pi.