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Oklahoma Agriculture in the Classroom



March 14 is Pi Day


The Greek letter pi, is the symbol for the ratio of the circumference of a circle to its diameter. Pi = 3.1415926535... Pi Day is celebrated by math enthusiasts around the world on March 14th.

Celebrate by making pizza, pot pie, veggie and/or fruit pie. Use the pies in the following math activities:

  • Measure by circumference.
  • Measure by area.
  • Determine approximate volume.
Hat sizes are determined using pi.
  • Students use measuring tape to measure the circumference of their heads. (Think of where a hat sits on the head).
  • Divide the circumference by pi to get the hat size.