Pi Day

March 14th is

Pi Day 3-14

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Archimedes (Known for his work with Pi)

• 287 BC – 211 BC • Spent most of his life in Syracuse, Sicily.

• Studied in Alexandria, Egypt under the followers of Euclid.

Archimedes • Invented War Machines used in the defense of Syracuse, compound pulley systems, planetarium, water screw, water organ, burning mirrors.

How Many Numbers?

• 1699 – Only 71 digits were correctly discovered.

• 1719 – 112 digits were found to be correct in France.

Pi Facts

• So far, the largest count of Pi was done by a supercomputer at the University of Tokyo in Sept of 2002. 1.2411 trillion decimal digits were calculated.

That looks like 1,241,100,000,000 numbers

Pi Facts • There are no repeating parts in Pi. This means that at no part during the 1.2411 trillion counts of Pi did the pattern begin to repeat itself. It is the only number like this in the world. • Albert Einstein was born on Pi Day in 1879

Pi Facts • No perfect circles or spheres exist in nature, since matter is composed of atoms and therefore lumpy, not smooth. So, the approximation of Pi may not be as close to 3.14‌

Pi Facts • Pi Day begins at precisely 1:59 p.m. on March 14. It reads 3/14/1:59 which corresponds to 3.14159‌

Pi Facts

• Pi is the first letter in the Greek word meaning perimeter. • The time it takes for a planet to orbit the sun has Pi involved.

Pi Equals?

• π = circumference/diameter ≈ 3.14 • π ≈ 22/7 or 3 and 1/7

Use Pi to Find: • The area of a circle = πr2 • Circumference of a Circle = πd or 2πr • Surface Area of a Sphere, Volume of a Cone, Cylinder and Sphere all are formulas that involve π.

Use Pi to Find: Right Cylinder – V = πr2h SA = 2πr2 + 2πrh

Right Cone – V = 1/3 πr2h SA = πr (l + r)

Sphere – V = 4/3 πr3 SA = 4πr2

What is "pi"?

• Mathematician: Pi is the ratio of the circumference of a circle to its diameter.

• Engineer: Pi is about 22/7.

• Physicist: Pi is 3.14159 plus or minus 0.000005 • Computer Programmer: Pi is 3.141592653589 in double precision.

• Nutritionist: Pie is a healthy and delicious dessert!

Pi Jokes Q: What do you get if you divide the circumference of a jack-o-lantern by its diameter?

A: Pumpkin Pi. Q: What do you get when you take a native Alaskan and divide its circumference by its diameter?

A: Eskimo pi.

Pi Jokes Q: What do you get when you take the sun and divide its circumference by its diameter?

A: Pi in the sky.

Q: What do you get if you divide the circumference of a bowl of ice cream by its diameter?

A: Pi a'la mode.

PI Competition • The competition is being held in M7(Miss Butlers Room) • The winner will win a prize • The record is 70 digits