Answer:
Hi,
All you have to do is to divide the hypotenuse by 3.
The length of the square is thus 1 in.
Explanation:
Let's assume x the length of the square:
The triangles ADG and BEH are also right isosceles triangles ( there is an angle of 45°)
AD=DE=EB=x = 3/3 in = 1 in