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All About Pi Created by Jan Abernethy March 2006
What is Pi? ,[object Object],[object Object],[object Object],π = circumference diameter
What is the “Value” of Pi? ,[object Object],[object Object],[object Object],3.141592551104866223558431126381048812355898112276391048823661691 12648104891237105711355110577023712221136511058672371277113652105 86823713861136671058762371496113682105891237171611369410589123723 75113696105806987498576984769847609873409867439857694387569803475 28937465283974658927364587923645897236458723645987236859742365298 76458726345897623897465283746587293465897236458726458972436952384 92322547392938475623987562897465298376598726549872365987236598726 87968197871987261987618719876187632198716239874168971236489761238 97641238976143298761911010101032178648764387263874687638763286234 23189432943213458745984753489760975645784326574365743256743657432 65743256743265743276543265743265743268743268743268743268732468742 38763468727364872364872634872634876238476287346872164872648726348 71623487216348762138746218764318726348712634876123876482173647126 34872163487621387462873647213648271364872136487126348726487126387 62487263847623876418276348716234871623874682734687126348721634872 61873461287364871263487126348761238746128736418732648712648754354 39875438935409453809543805349854309854309801010101029389813287243 87634287643287648723648762384762387462873648726348726348726348726
History of Pi ,[object Object]
Who Discovered Pi? ,[object Object],[object Object],[object Object],Hi, I’m Archimedes… Pi = Between 223/71 and 22/7
The Death of Archimedes ,[object Object],[object Object],[object Object],THAT’S HOW IMPORTANT PI WAS TO ARCHIMEDES!!!!!
Currently the value of pi is known to 6.4 billion places ! 3.14128… 22/7 250 BC Archimedes Equivalence Discovery When? Who? 3.1415926535… Pi Today Computers 3.16227766... square root of 10 2000 BC Indians 3.125 3 1/8 2000 BC Babylonians 3.160493827... (4/3) 4 2000 BC Egyptians THE DISCOVERY OF PI
The Usefulness of Pi ,[object Object],[object Object],[object Object]
Let's review some DEFINITIONS
Diameter and Radius ,[object Object],[object Object],[object Object],diameter, D radius, R
radius
diameter
C i r c u m f e r e n c e ,[object Object]
π = Pi = circumference divided by diameter Every time you use these formulas, you will come up with 3.14159265… π = circumference diameter circumference 2 x radius
[object Object],area, A
I drew polygons of more than 90 sides! Take it from me… the area of a circle is π r 2
APPROXIMATELY The symbol means When speaking of pi we always use Example: π 3.14 ~ = ~ = ~ =
LET’S REVIEW THE FORMULAS! π = circumference diameter
SOME NAMES FOR PI 3.14 22 7 ___ pi π Hope you enjoyed learning about Pi!!! ~ = ~ =

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What I Spi

  • 1. All About Pi Created by Jan Abernethy March 2006
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  • 7. Currently the value of pi is known to 6.4 billion places ! 3.14128… 22/7 250 BC Archimedes Equivalence Discovery When? Who? 3.1415926535… Pi Today Computers 3.16227766... square root of 10 2000 BC Indians 3.125 3 1/8 2000 BC Babylonians 3.160493827... (4/3) 4 2000 BC Egyptians THE DISCOVERY OF PI
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  • 9. Let's review some DEFINITIONS
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  • 14. π = Pi = circumference divided by diameter Every time you use these formulas, you will come up with 3.14159265… π = circumference diameter circumference 2 x radius
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  • 16. I drew polygons of more than 90 sides! Take it from me… the area of a circle is π r 2
  • 17. APPROXIMATELY The symbol means When speaking of pi we always use Example: π 3.14 ~ = ~ = ~ =
  • 18. LET’S REVIEW THE FORMULAS! π = circumference diameter
  • 19. SOME NAMES FOR PI 3.14 22 7 ___ pi π Hope you enjoyed learning about Pi!!! ~ = ~ =