Pi is equal to 3.1415926535… (continuing on forever). It is an irrational and transcendental number, meaning it will continue infinitely without repeating. It has been calculated on computers to over 1 trillion digits past the decimal point.
In honor of Pi Day, here's a whole slew of fun ways to celebrate with your kids. Be sure to click on the list above to see photos for even more.
- Sing Pi Day songs and carols. Teach Pi has wonderful pi carols such as "Ludolph the Mathematician" and "Oh, Number Pi." The Math Forum has more songs and carols, such as "I'm a Little Number," "This Old Pi" and "Sing a Song of Pi Day."
- Challenge the kids to see how many digits of pi they can memorize. Here it is to 50 decimal places: 3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510. How to Memorize Pi has tips to help you.
- Try cutting pi with various round items and some string. This is a simple, hands-on way to really illustrate pi for kids.
- Watch Pi Day videos. Pi Day has videos of pi dominos, a Pi Day rap and lots more.
- Challenge the kids with this Pi Day Sudoku Puzzle.
- Check out Scholastic's pi resources. They've got videos, history lessons, links and more.
Here’s a mnemonic for pi in the form of a poem about Archimedes by A.C. Orr. The number of letters in each word helps you remember pi to 30 spaces.
Now I, even I, would celebrate
In rhymes unapt the great
Immortal Syracusan, rivaled nevermore,
Who in his wond’rous lore,
Passed on before,
Left men his guidance
How to circles mensurate.
And here’s a cute one to remember pi to 7 places:
How I wish I could calculate pi…
Happy Pi Day!