# The perimeter of the square is 28 cm. Find the length of one side of it. What is the area of this square?

August 31, 2021 | education

| The sum of all sides of a square is determined by the formula:

P = 4 * a.

Provided that the perimeter is 28 cm, we find the length of such a figure, the second factor is equal to the quotient of the product of the first:

a = P: 4 = 28: 4 = 7 cm.

We calculate the area by substituting the measurement for the formula:

S = a² = 7 * 7 = 49 cm².