Celebrate Pi Day March 14th - Happy Pi Day!
Learn About the History of Pi
Play or Sing Pi
Watch Free Video Clips From Project Mathematics Story of Pi
The program opens with a reporter interviewing young people, asking "What can you tell me about the number pi?" Students are not able to give correct answers. The program defines pi, shows how pi appears in a variety of formulas and throughout history with some animation. The next segment describes different rational estimates for pi obtained by various cultures, and points out that pi is irrational. The program returns briefly to the reporter, who interviews the students again, asking, "Now what can you tell me about pi?" This time, each student gives a different correct statement about pi. The concluding segment explains that major achievements in estimating pi represent landmarks of important advances in the history of mathematics. Watch it now.
Memorize Digits of Pi and Have a Contest
There are many ways used to memorize pi including music and mnemonics. Try some out and have a friendly contest.
Sing a Song About the Area and Circumference of a Circle
"The area of a circle is Pi r squared, Pi r squared, Pi r squared …"
Full Lyrics
Read a Book About Pi
Check out the History of Pi, the Joy of Pi and for kids the Sir Cumfirence Series by Neuschwander.
Watch Music Videos About Pi
Tell a Pi Joke
Q: What do you get when you take the sun and divide its circumference by its diameter?
A: Pi in the sky.
Have a Pi Day Party!
Have a Pi Day Party with pi-zza, pi-e and pi-neapple juice, and don’t forget a pi- ñanta.
End your party with a pi walk, run or hike (3.14 km or miles) to burn off all the pi-e!
Convert Everyday Things into Pi
Convert circular things into radian, for example 3:00 would be ½ pi o’clock. Or simply use 3.14 as a measurement constant and determine your pi age (your age in years divided by pi).
Answer Trivia Questions About Pi
Search for Your Favorite Number or Patterns in Pi
Have you ever wanted to find out where your lucky number appears in the number pi? This Pi Searcher uses a combination of linear search (searching each digit one by one) for small search strings and a pre-computed index for large search strings.
Look up the Digits of Pi
Want to see Pi to 1,000,000 or even 50,000,000 places? Or download one billion digits of pi.
Check Out Other Pi Day Celebrations
Other Pi Activities
- Find Out the Frequency of Each Digit of Pi
- Cutting Up Circles Activities
- Pi- Ku - These poems are based on haiku style using the digits of pi for the number of letters in a word.
- Pi Limericks
- Make a Pi Necklace. Use a different color bead to represent the different digits. This demonstrates well the randomness of pi.
- Send a Pi Day Greeting Card
- Discovering the Value of Pi Lesson
- More Pi Day Activities from Mr Herte
- Pi Day Activities Document from the School District of Philadelphia. This 12 page pdf has activities for all grade levels.
Think About Other Days You Could Celebrate Pi Day
Besides March 14th (which uses the American date standard of 03/14), there are other days to celebrate pi. Pi Approximation Days may be observed on several dates, most often July 22 (22/7 using the European date format) which is the most popular approximation for pi. We could also celebrate on November 10th (the 314th day of the year) or November 9th in a leap year. One could also celebrate Pi in December on the 355th day at 1:13 for the Chinese approximation 355/113. You could even choose February 27th when the Earth is estimated to have traveled 1 radian (equal to 180/π degrees) of its orbit since the New Year.
Think About Other Math Days You Could Celebrate!
- Square Root Day
- 100 Days of School
- Prime Number Days
- Your Golden Birthday
- Leap Year Day
And Don’t Forget to Keep Up on Pi News!
Have a Happy Pi Day!
