Consider a square sheet of side 1 unit. The sheet is first folded along the main diagonal. This is followed by a fold along its line of symmetry. The resulting folded shape is again folded along its line of symmetry. The area of each face of the final folded shape, in square units, equal to _____.
1
\(\dfrac{1}{4}\)
2
\(\dfrac{1}{8}\)
3
\(\dfrac{1}{32}\)
4
\(\dfrac{1}{16}\)