I'm going to assume you want to find the area and perimeter.
Note that the sides of a square are always the same.
Find the area [ A = bh ]
A = 4 2/9 * 4 2/9
A = 17 67/81
Find the perimeter [ P = 2b + 2h ]
P = 2(4 2/9) + 2(4 2/9)
P = 16 8/9
Therefore, the area is 17 67/81 and the perimeter is 16 8/9
Best of Luck!