Pi is infinite, so is this article.
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Though pi is one of the best known irrational numbers in the world, there are other less-known irrational numbers that are still interesting to learn about.

## Phi Edit

One of the first numbers that comes to my mind other than pi when somebody says "irrational number" is phi. We have a whole page on phi to learn more about it. Click on this link to learn more about phi.

## Non-perfect Squares Edit

Though this isn't a single irrational number, non-perfect squares are any two same numbers that when multiplied, give a whole number. Non-perfect squares are always irrational, though, instead of perfect squares, which are always whole numbers. The interesting thing is, *any *non-perfect square is irrational.