Question 972851
squares with side s have diagonals of s sqrt(2).  This is the Pythagorean theorem with angles 90-45-45.  it is sqrt(2)-1-1 ratio.

Therefore, a diagonal of 6 has a side of 6/sqrt(2). Units are meters

rationalizing by multiplying top and bottom by sqrt (2), 6 sqrt (2)/2

That is 3 sqrt (2)=4.2 meters