If the side of each square is $1 cm$, then find the shaded area of the following figure.

The correct option is (A),

Given the side of each square is $1 cm$.
The area is the region enclosed inside a figure.
The area of each square is $1\times 1=1 c{m}^2$.

There are a total of $27$ full squares.
Hence the area is $27\times 1=27 c{m}^2$