There are infinitely many possible rectangles. Let A be ANY number in the range (0,6] and let B = 12-A.Then a rectangle with width A and length B will have a perimeter of 2*(A+B) = 2*12 = 24...
Its area is 36 m2
12
The perimeter of a square is simply 4 times the length of a side.
Assuming the figure is a regular rectangle, the perimeter of the rectangle will be (27.8 + 34.2) x 2 = 124 centimetres.