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Active Time
20-30 minutes
Total Project Time
20-30 minutes
Key Concepts
Circle, circumference, diameter, mathematical formula, Pi

Introduction

Mathematicians look at the world around them in terms of numbers and formulas, and now, you can discover the formula for Pi too! In this science activity you will examine circular objects and see what you can discover about their sizes. As you explore, you might be surprised at how useful the results can be—maybe it will inspire you to save up for a bike with bigger wheels!

Credits

Sabine De Brabandere, PhD, Science Buddies
This activity is not appropriate for use as a science fair project. Good science fair projects have a stronger focus on controlling variables, taking accurate measurements, and analyzing data. To find a science fair project that is just right for you, browse our library of over 1,200 Science Fair Project Ideas or use the Topic Selection Wizard to get a personalized project recommendation.

Materials

  • At least three circular objects of different sizes. Large coins, round container lids, and bicycle wheels work well.
  • A roll of twine or ribbon that you can cut into small pieces
  • Scissors
  • Optional: Tape, such as masking tape
    Circular objects and other materials needed to do a science and math activity on how to find Pi.

Reviews

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Active Time
20-30 minutes
Total Project Time
20-30 minutes
Key Concepts
Circle, circumference, diameter, mathematical formula, Pi
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