EQ – What is Pi?

By Mrs. Pulliam, 2012

Pie…Pi??Words that have the same

pronunciation, but different spellings and meanings are called _________________

So what’s the BIG DEAL?? I don’t get it!

Talk with an elbow partner and share any background knowledge

that you may have.

http://fozzy42.com/SoundClips/Themes/TV/AndyGriffifth.wav

Let’s start by drawing a PERFECT circle.

http://www.youtube.com/watch?v=6yiqsh-84Ho

http://dictionary.reference.com/browse/pi

Vocabulary:circle

circumferencearea

radiusdiameterirrational

Pi Jokes!o Q: What do you get when you cut a jack o'lantern by its diameter?o A: Pumpkin Pi.

o Q: What do you get when you take green cheese and divide its circumference by its diameter?o A: Moon Pi.

o Q:What do you get when you take the sun and divide its circumference by its diameter?o A: Pi in the sky.

o Mathematician: Pi r squared"o Baker: No! Pies are round, cakes are square!

Ludolph van Ceulen (1540 - 1610) Tireless hand-calculator who took pi to 35 digits & had them engraved on his

tombstone

Can you do this?

Ring The Bells (to the tune of Jingle Bells)

Basking in the glowOf a Math Class holiday.

All we need to knowIs "Pi will lead the way!"

To circles we will sing,The digits we'll recite

The ratio gives us everythingIt's geometry's delight! Oh!

Ring the bells, Pi Day spellsFun with 3 - 1 - 4!

It's the day to celebrateThat number we adore! Oh!

Ring the bells, Pi Day spellsFun with 3 - 1 - 4!

First we take one slice of PiAnd then we ask for more!

Pi Goes to Washington (March 2009) » Congress votes, not quite unanimously, to officially recognize March 14 as Pi Day

A brief description...

Only 112 years after its last appearance on a legislative floor—the doomed bill in the Indiana statehouse that offered nine different values for the number—Pi made a surprise appearance in the U.S. House of Representatives in 2009.

March 14 fell on a Saturday in 2009, but that didn‘t stop things from heating up in the week leading up to it. On Monday, March 8th, Representative Bart Gordon of Tennessee introduced House Resolution 224, officially called “Supporting the designation of Pi Day, and for other purposes.” As the chairman of the House Committee on Science and Technology, Gordon’s intent was clear: to use the holiday as a platform for making a statement about the importance of math and science education in America.

Pi Rap

http://www.brainpop.com/math/numbersandoperations/pi/zoom.weml

What if you wanted to put new tile down on your bathroom floor? You would need to find the AREA of your floor. Do you remember how to find area of a rectangle? Your bathroom floor is 8 feet by 5 feet. How many square foot tiles would you need to buy at Home Depot to cover your floor?

Now, what if the room was circular instead of a rectangle?

How would you find area of circle?? area = Pi r2

So how was Pi “discovered”?The circumference divided by the

diameter of the circle. Try it!

So…Pi is an irrational number. It is the relationship between the

circumference of a circle and the diameter of the same circle.

Summarize your Learning!