And, is it possible to live without it? If, yes, does the square will remain the same?
This wiki-page shows old endeavors to write the square root of 2 in fractions; is there any other figures in the Ancient Egyptian Math? If, no, why they did not have one, despite they had known the square? http://en.wikipedia.org/wiki/Square_root_of_2
Forgave me if you see the above within the realm of the naive notions; and please be specific if you intend to answer.