


 The
Topic:
 Pi

 Easier  Pi sounds
like pie and is equal to about 3.1416. In math,
this is the ratio of the circumference of a circle
to its diameter. In other words, pi is a number
that equals the quotient of the circumference of a
circle divided by its diameter. Many people
celebrate pi by holding a Pi Day on March 14th or
3/14.

 Harder  The Greek
letter pi represents the number by which the
diameter of a circle must be multiplied to obtain
the circumference. Pi is an irrational number. That
is, it cannot be written as a simple fraction or as
an exact decimal with a finite number of decimal
places. However, you can increase the number of
digits until you reach a number as near to pi as
needed. Mathematicians with computers have
calculated pi to millions of decimal places.

 Pi is used in several mathematical
calculations. The circumference of a circle can be
found by multiplying the diameter by pi (c = pi X
d). The area of a circle is yielded by multiplying
pi by the radius squared (A = pi X rsquared). Pi
is also used to calculate the area of a circle, and
the volume of sphere or a cone.


 Math
Library  Pi from The Math Forum, Drexel
University
 http://mathforum.org/library/topics/pi/
 This huge site provides information and links
to all kinds of information on the number pi.

 Pi
Mathematics
 http://archive.ncsa.uiuc.edu/Edu/RSE/RSEorange/buttons.html
 Find out the history of this odd number and
discover some fun projects and activities you can
do with pi.
 Related Websites:
 2) Finding the Value of Pi http://mathforum.org/isaac/problems/pi1.html
 3) History of Pi
 http://wwwgroups.dcs.stand.ac.uk/~history/HistTopics/Pi_through_the_ages.html
 4) Joy of Pi by D. Blatner http://www.joyofpi.com/
 5) Pi Pages http://www.cecm.sfu.ca/pi/

 Ridiculously
Enhanced Pi Page from
Exploratorium
 http://www.exploratorium.edu/learning_studio/pi/
 Here you have information about 'Pi Day',
music, beads, and pie!

 Web
Page Dedicated to Pi
 http://www.wpdpi.com/index.shtml
 This site has lots of great information on pi
and was once featured in an article in the San
Francisco Examiner, Partying
for Pi by G. Smith.



 Websites By Kids For Kids
 Dale's
Pi Page by D. Winham
 http://www.geocities.com/SiliconValley/Pines/5945/
 Here you find facts, news, history, notes,
digits, songs, jokes, charts, poems, links and a
program for pi.

 More Pi Pages
 Archimedes
and the Computation of Pi from
University of Utah
 http://www.math.utah.edu/~alfeld/Archimedes/Archimedes.html
 Learn more about Archimedes (approximately
285212 B.C.), the famous ancient Greek
mathematician and inventor.
 Related Websites:
 2) Archimedes' Approximation of Pi
 http://itech.fgcu.edu/faculty/clindsey/mhf4404/archimedes/archimedes.html
 3) Archimedes Constant http://www.mathcad.com/library/constants/pi.htm

 Digits
of Pi
 http://www.cecm.sfu.ca/projects/ISC/data/pi.html
 This site provides pi to 10,000 digits and
50,000,000 digits.

 Frequently
Asked Questions About Pi from Dr. Math at
the Math Forum
 http://mathforum.org/dr.math/faq/faq.pi.html
 What is pi? Who first used pi? How do you find
it? How many digits is it?

 Incredible
Pi Code from I. Perterson's
MathTreck, Mathematical Association of
America
 http://www.maa.org/mathland/mathtrek_4_1_00.html
 This article focuses on codes derived by the
substitution of letters of the alphabet for the
digits.
 Other Related Articles:
 2) Eskimo Pi by K. Devlin from the
Mathematical Association of America
 http://www.maa.org/devlin/devlin_2_97.html
 3) Passion for Pi by I. Peterson from the
Mathematical Association of America
 http://www.maa.org/mathland/mathland_3_11.html
 4) Story of Pi by L. Mudehwe http://www.geocities.com/CapeCanaveral/Lab/3550/pi.htm
 5) Slice of Pi, Anyone? by J. Shepler http://www.execpc.com/~shepler/piday.html

 Paul's
Page of Pi
 http://www.escape.com/~paulg53/math/pi/
 Most of the content of the site is focused on
methods of calculating pi.
 Related Websites:
 2) Pi Pages http://www.cecm.sfu.ca/pi/pi.html
 3) Slice of Pi by M.D. Huberty, K. Hayashi,
& C. Vang
 http://www.geom.umn.edu/~huberty/math5337/groupe/

 Pi
Irrationality Proof from Robert's Neat
Math Pages
 http://www.math.clemson.edu/~rsimms/neat/math/piproof.html
 This site has a proof of how pi can be defined
as an irrational number.

 Pi
Page by R.W. Clickery
 http://www.ccsf.caltech.edu/~roy/upi/pi.html
 Here you have a 'mere' 50,000 digits of pi, a
few software programs for computing, and some
quaint facts about pi.

 St. Louis
Pi Day by T. Chun, C. Daniel, and J.P.
Kanoa
 http://planetpi.8m.com/
 Learn how this school celebrates the great
number of pi.
 Similar Website:
 2) Middle School Pi Day by S. Haddad and
A.Owens from Germantown Academy
 http://www.ga.k12.pa.us/academics/MS/PiDay/Index.htm

 Partying
for Pi by G. Smith from the San
Francisco Examiner
 http://www.sfgate.com/cgi
 bin/article.cgi?file=/examiner/archive/1999/03/14/BUSINESS13807.dtl
 Here is an online newspaper article about pi
and pi day celebration.

 Websites For Teachers
 Circles
in Geometry (Grades 46)
 http://www.teachnet.com/lesson/math/geometry/circlesingeo.html
 Grade school geometry doesn't have to get into
a detailed lesson on pi to communicate the basics
of this constant.

 Chronological
History of Pi with Developmental Activities in
Problem Solving (Grades 710) by A.P. Solli
from YaleNew Haven Teachers Institute
 http://www.cis.yale.edu/ynhti/curriculum/guides/1980/7/80.07.11.x.html
 The unit begins with a historical development
of pi and proceeds with examples of activities to
help students develop a deeper appreciation of the
mathematical value of pi.

 Discovering
Pi (Grades 57) by J. Eckley from
AskERIC
 http://ericir.syr.edu/Virtual/Lessons/Mathematics/Geometry/GEO0001.html
 This activity allows students to discover why
pi works in solving problems dealing with finding
circumference.
 Related Lesson:
 2) Introduction to Pi and the Area of a Circle
(Grades 57) by E.R. Justice
 http://www.iit.edu/~smile/ma96m4.html

 Pi
Day Celebration from The Math Forum,
Drexel University
 http://mam2000.mathforum.org/t2t/faq/faq.pi.html
 Here are some activities you can use for a 'Pi
Day' celebration on March 14 (3.14)?

 Proving
Pi (Grades 810) by G.D Williams
 http://www.iit.edu/~smile/ma8719.html
 This activity has students discovering the pi
ratio by completing a circles activity.

 What
is Pi? by M. Kelley
 http://www.middleweb.com/INCASEpi.html
 Here you find activities to explore the meaning
of pi.





 Created by
Annette
Lamb and
Larry
Johnson,
2/02.
