**Useful Numbers**

Useful Numbers Chart

This chart lists the five most useful irrational numbers: pi, square roots of 2 and 3, phi (golden mean), and e (Euler's number). Each number has a simple diagram showing why the number is fundamental. It tells students to memorize a few digits of each of these mathematical constants.

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Useful Numbers Small Poster $15.39 |
Useful Numbers Large Poster $19.79 |
Useful Numbers Mini Poster Print $5.49 |

Useful Numbers Banner $45.09 |