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HISTORY OF PI The first calculation of pi was done by Archimedes of Syracuse in approximately 287–212 BC, that was a long time ago. ( 1) Mathematicians began using the Greek letter π in the 1700s. (1) Georges Buffon devised a way to calculate pi based on probability. We refer to the illustration of this phenomena as Buffon’s Needle. (2)
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SHERRI BROGDON
THE IRRATIONAL WORLD OF PI
DEFINITION AND VOCABULARY OF PI• Definition of pi is the ratio of the circumference to the diameter of a circle • The approximate area of the circle lies between the areas of the circumscribed
and the inscribed hexagons.• Pi is an irrational number – a number that never ends or never repeats.• Pi is approximately 3.14 or exactly 22/7.• Pi can be rounded to 3 only when answering multiple choice questions or
estimating.• Pi is a number used in the calculation of formulas for shapes with circular parts.
HISTORY OF PI• The first calculation of pi was done by Archimedes of Syracuse in
approximately 287–212 BC, that was a long time ago. ( 1)• Mathematicians began using the Greek letter π in the 1700s. (1)• Georges Buffon devised a way to calculate pi based on probability. We refer
to the illustration of this phenomena as Buffon’s Needle. (2)
USES OF PI
Circles:Spheres: Volume = 4r2
Cones:Cylinders:
WORK CITED
Information:
1. Exploratorium. (2013). http://www.exploratorium.edu/pi/history_of_pi/
2. Reece, G. (2014). Buffon’s needle: An analysis and simulation. Retrieved November 13, 2014 from http://mste.illinois.edu/activity/buffon/
Images:
http://www.ualr.edu/lasmoller/pi.html
http://www.mathfunny.com/pi-piday-joke/
http://3dshapes.org/3d-shapes-cylinder-shape.html
http://mkweb.bcgsc.ca/pi/art/
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