π

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π

  1. 1. π Nicholas 6CFriday, 15 March, 13
  2. 2. Pi is... • An infinite string of digits • 3.1415926535897932384626433832795028841971693993... • An expression (π) • An irrational number • The sixteenth letter of the Greek alphabetFriday, 15 March, 13
  3. 3. PI IS USED FOR: • Finding the circumference and area of a circle, cylinder or sphere • Getting the area of a part of a circleFriday, 15 March, 13
  4. 4. TAU ‘Tau’ (pronounced ‘t-ow’) is equal to 2π (pi multiplied by 2; 6.28318...). It is debated that tau should replace pi, as many problems require usage of 2π.Friday, 15 March, 13
  5. 5. FUN FACTS: • With just 39 digits of pi, you can measure the circumference of the observable universe, accurate to the width of a single hydrogen atom. • As of February 20th, 2013, scientists have discovered the digits of pi to about 10 trillion digits. • In 1897, pi was almost legally changed to 3.2 by a professor in Indiana. •Friday, 15 March, 13
  6. 6. CREDITS: • http://www.youtube.com/user/numberphile • http://library.thinkquest.org/C0110195/uses/uses.htmlFriday, 15 March, 13

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