One side of a square is 4 cm. what is the perimeter of the whole square?
The perimeter of a square is calculated by multiplying the length of one side by 4 (since all sides of a square are equal).
Perimeter = 4 x side length
Given that the side of the square is 4 cm:
Perimeter = 4 x 4 = 16 cm
Therefore, the perimeter of the whole square is 16 cm.