Presentation on the basis of History of Pi

1. Math presentation on
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History of

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Group Members
Group-3

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Al-Khwarizmi
• Lived in Baghdad
• Gave his name to the
word “algorithm”
• The word “algebra”
comes from al jabr, the
title of one of his books
• Was the pioneer of the
calculation of pi in the
East
Al-Khwarizmi

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– Ptolemy calculated pi to be 3.1416
– Zu Chongzhi obtained the value pi= 355/113
– Al-Khwarizmi without knowledge of Ptolemy’s
work found pi to be 3.1416
– Al-Kashi calculated pi to 14 decimal places
– Roomen calculated pi to 17 decimal places
– Van Ceulen calculated pi to 35 decimal places
Pi becomes more and more exact

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Mathmetical Equation

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Right Cylinder – V = πr2h
SA = 2πr2 + 2πrh
Right Cone – V = 1/3 πr2h
SA = πr (l + r)
Sphere – V = 4/3 πr3
SA = 4πr2

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What is the “value” of pi?
Pi is an irrational number-Its decimal repeats
forever.
Mathmaticians estimate digits of Pi to use it
in real world settings.
Pi is usually rounded off to about 3.1415.

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Quotes

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