Nettling Newsline Pi Day

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Pi Day is 3.14

What is pi?

Pi is the name given to the ratio of the circumference of a circle to the diameter. That means, for any circle, you can divide the circumference (the distance around the circle) by the diameter and always get exactly the same number. It doesn't matter how big or small the circle is, Pi remains the same. Pi is often written using the symbol and is pronounced "pie", just like the dessert. Speaking of desserts, we will celebrate this special Pi(e) day by eating round snacks, like round cookies, round crackers, round candies, and especially round pies.

How do we use pi?

Here are some examples of how we use pi to help us get measurements of circles.

r = radius of circle

= 3.14

Circumference of a circle = d

Circumference of a circle = 2 r

Area of a Circle = r²

Where can I learn more about pi?

BrainPOP: Measuring a Circle

Tim and Moby explain in their movie how to measure a circle and use pi to get the circumference and area. Entertaining!

BrainPOP: Measuring a Circle Quiz

Test your knowledge and skill in figuring measurements of a circle.

Am I in Pi?

Use this site to find out if your birthday is in Pi!

3.14ever Pi

This ThinkQuest site gives you the opportunity to read student articles about the mathematical concept of pi, its history, and religious connections to pi.

The Value of Pi

Try memorizing this decimal!

The History of Finding the Value of Pi

See the world's history of discovery for the value of pi.

Exploratorium Pi Links

Information for links for Pi Day.

Earth Mysteries: Pi

What is Pi, and just how many decimal places does it go?

Pi Day Songs

Here are some common tunes with new words just for pi day

Dr. Math FAQ's about Pi

This is a great place to see what questions about pi Dr. Math has fielded in the past. A great resource for anyone who wants to know more about pi.

Mrs. Nettling

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