the perimeter of the square is 4cm what is the area?

Since the perimeter is 4 cm and all the sides of the square have the same length, each side must be 1 cm long.

The area of that square is 1 cm x 1 cm, which is 1 cm².

Since all sides are the same, the side length is just 1 cm.

And the area is just the side length squared = (1 cm)^2 = 1 cm^2   ....!!!!