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Celebrate Pi Day By Dr. Kevin Ferland Bloomsburg University

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π Day is 3/14 since π = 3.14159……… with fireworks at 1:59 pm. It is celebrated / recognized in mathematics classrooms everywhere!

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Formulas Defintion: π = C/d Q: Is it the same for all circles? Theorems: C = π d C = 2π r A = π r 2 Q: In the area, really!!????

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Today is (7+ π)-Day P = 7+ π 2.5 2

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Mole Day 10/23 Chemistry Classes Avagadro’s Number 6.02 ×10 23

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History The symbol π was first used in 1706 by William Jones in “Synopsis Palmariorium Mathesios” However, its use was popularized by Euler. 2006 is the 300 th Anniversary!!! 2020 will be even better!!! Pi-Centennial

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Archimedes c. 250 BC proved A = π r 2 John Lambert 1761 proved π is irrational. Ferdinand von Lindemann 1882 proved π is transcendental.

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More Formulas S = 4 π r 2 V = 4/3 π r 3 V = 1/3 π r 2 h S = π r √(r 2 + h 2 )

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More Advanced..

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Less Advanced Math Adventure Books by Cindy Neuschwander Sir Cumference and the … … Dragon of Pi … First Round Table … Sword in the Cone … Great Knight of Angleland

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Characters Sir Cumference Wife: Lady Di of Ameter Son: Radius Friend: Vertex Sword: Edgecalibur Carpenters: Geo and Sym of Metry

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When Sir Cumference drinks a potion which turns him into a dragon, his son Radius searches for the magic number known as pi which will restore him to his former shape

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Activities Digit Memorization Contest Keep School Records The Finley Middle School records are as follows: 6th grade 70 digits; 7th grade 307 digits and 8th grade 157 digits! http://www.mathwithmrherte.com /pi_day.htm

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Measure circles and compute the ratio of the circumference to the diameter Use cans, plates, frisbees, the trash can … Have each student gather data Compute a class average for a Pi estimation

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Jennifer Bettine Bishop Hafey Jr. High

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The Buffon Needle Experiment __________________________ Drop a needle of length equal to the distance between the lines

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More Activities Make a frequency distribution of the digits of Pi Consider a regular n-gon, use the apothem for the radius r, use the perimeter for the circumference C, and define π n So C = 2 π n r Note A = π n r 2 Sing Pi Songs (or write some).

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Songs Happy Pi Day Happy Pi day to you, Happy Pi day to you, Happy Pi day everybody, Happy Pi day to you. (to the tune of "Happy Birthday")

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Oh Number PI Oh, number Pi Oh, number Pi Your digits are unending, Oh, number Pi Oh, number Pi No pattern are you sending. You're three point one four one five nine, And even more if we had time, Oh, number Pi Oh, number Pi For circle lengths unbending. … (to the tune of "Oh Christmas Tree")

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"American Pi" all rights reserved lyric © 1997- 2005 Lawrence Mark Lesser May be sung to the tune of Don McLean’s “American Pie” CHORUS: Find, find the value of pi, starts 3 point 1 4 1 5 9. Good ol’ boys gave it a try, but the decimal never dies, The decimal never dies.........

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2. Pi Day SongsThese Pi Day songs were written by LaVern Christianson, when he was a math teacher... To sing a jolly pi day song in a fun math class like this. (Repeat )...http://www.winternet.com/~mchristi/piday.html [Found on Google, Yahoo! Search, Ask Jeeves]Pi Day Songs 3. Pi DayPi Day Songs These songs were written by some of Mr. Herte's students... Song Contest (All Grades) There are two wonderful Pi Day songs on the web see the...http://www.mathwithmrherte.com/pi_day.htm [Found on Google, Yahoo! Search, Ask Jeeves]Pi Day 5. americanpi.htmlThen Lambert showed it was a lie to look for rational pi. He started singing............. So the bill was left to die Li ke the quest for rational pi....http://www.math.utep.edu/Faculty/lesser/americanpi... [Found on Google, Yahoo! Search]americanpi.html 6. PI DAY WINNERSPI DAY WINNERS. This year, the 6th annual PI DAY was held in Mr. Hoyle's class. Students had an opportunity to do classwork and enter various contests to explore, learn and celebrate the irrational number PI.... Last year saw the first entrance of an original Pi song (see below for lyrics). Although no new songs...http://users.rcn.com/jhoyle.massed/pi.html [Found on Yahoo! Search, Ask Jeeves]PI DAY WINNERS 8. Here are links to each of my classes in Spring 2000Here are three versions of the Pi Song. Each has its strengths and weaknesses. Pi Song Live A live performance by `The Derivatives' at a coffee house in...http://facstaff.bloomu.edu/kferland/Pi_Songs/songs... [Found on Google, Ask Jeeves]Here are links to each of my classes in Spring 2000

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Resources Search on Pi Day Mathematics Educators of Greater Saint Louis http://www.mobot.org/education/ megsl/pi.html

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But I know what they are Circles. Parts of a Circle OK, I’ve got all that, but what is all that stuff about Pi and how does it help with circles? Chord.

But I know what they are Circles. Parts of a Circle OK, I’ve got all that, but what is all that stuff about Pi and how does it help with circles? Chord.

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