Perimeter of the square = 4 dm. What is the length of its side?

According to the condition of the assignment, the perimeter of the square is 4 dm.
We know that all sides of such a figure are equal, therefore, their sum is calculated by the formula:
P = 4a.
You can find a measurement, for this we divide the product by the first factor, that is:
a = P: 4. Substitute the known values:
a = 4: 4 = 1 dm or 10 cm – the length of the side of the square.