Pi

When is a letter a number? In this BrainPOP UK movie, Tim and Moby introduce you to the magical little number called pi! In this educational, animated movie, discover where the concept of pi comes from, what ratio it represents, and why all circles have it in common. You’ll also find out why we use a Greek letter to represent the number, what an irrational number is, and why irrational numbers can’t be written as fractions. Best of all, you’ll learn how to use pi to calculate the circumference and area of a circle. Those ancient Greeks knew a thing or two!

Related movies: Rounding, Decimals, Converting Fractions to Decimals, Simple Equations

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