Given that the area(A) of the shapes is given as 36 square units.
Testing the correct options for confirmation
Option B
A rectangle with a length of 9units and width of 4units.
The formula for the area of a rectangle(A) is,

Therefore, the area of the rectangle is 36unit².
Option C
A square with sides that are 6 units long.
The formula for the area of a square is,

Therefore, the area of the square is 36unit².
Hence, the correct options are Option B and C.