Pi Day begins on 3/14 at 1:59:26 AM.
There’s a large shiny metal sculpture of pi in one of our local parks. My three-year-old daughter asked what it was. I knew it was the mathematical symbol for the number pi, beginning with 3.1415926, but I wasn’t prepared with a helpful answer for a child. That was six years ago.
My daughter and I have collected and explored many fun facts and resources since then. Nowadays, math is my daughter’s favorite subject and she’s looking forward to Pi Day, March 14 (3/14 beginning at 1:59:26 a.m.). For most of us, it might be easier to make a special observance at 1:59 p.m.
We like to start with the free BrainPOP animated video about pi and the What Pi Sounds Like music video.
Fun Facts About Pi (π)
- Pi is such a big number that we use the symbol π instead of 3.1415926…. Go to orgto see the first one million digits of pi.
- π is the lowercase of the sixteenth letter of the Greek alphabet. It represents “p.”
- π is the ratio of any Euclidean circle’s circumference to its diameter. Euclid was a Greek mathematician and author of the geometry text The Elements.
- Pi is an irrational number. That means it will continue forever without repeating.
- Pi cannot be represented as a fraction.
- Pi is a mathematical constant. The ratio between a circle’s circumference and diameter will always equal π.
- Albert Einstein was born on Pi Day, 1879.
PI Day Activities and Resources for Kids
- Pi Day began at the San Francisco Exploratorium. See the Exploatorium Pi website for Pi history and activities, including eating apple pi, singing pi songs, and beading an ongoing pi chain.
- You might make a pi necklaceto explore irrational numbers.
- If you’ve got questions, ask Dr. Math about piat the Math Forum. You’ll also find archives of answers and links to further resources.
- Joe Nowak’s recommends several Pi Day classroom activities, including making a paper pi chain, reading famous pi poems and essays, listening to pi songs like The Pi Song, and watching the international film Pi.
- Alex Sharp recommends several Pi Day lesson plans and activity ideas, including Pi Day cards and games.
- The Khan Academy video Tau Versus Pi, suggests that tau might be a better number to look at than pi.
- Pi Pies– Find the circumference worksheet.
- π – Color the Greek letter pi.
Whether you get up at 1:59:26 a.m. or not, 3/14 is bound to be an interesting day of exploration into the neverending number π.