# Number Systems G9

We all know Pythagoras theorem by now. But did you know it played a crucial role in proving that irrational numbers exist? Yes! A triangle with two sides except for hypotenuse, measuring 1 unit was taken into consideration. The length of the hypotenuse will thus be the square root of 2. By using various equations is was proved that 2 cannot be written in the form of p/q. Want to explore more about this fascinating concept? Watch our videos for more.

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