Colliding worlds…
I love it when my worlds collide like this. Root 2 is a number that I use almost daily, since a gain of root 2 is a gain of approximately 3 dB – resulting in an audio signal with twice the power.
In this video I learned that the dimensions of an A0 sheet of paper are defined as having a length:width ratio of root 2, and an area of 1 m2.