The area of a square is 25 cm2, which is equal to its sides and perimeter.

The opposite sides of the rectangle are equal in length and parallel to each other.
The area of ​​the rectangle is calculated by multiplying the length of the shape by its width:
S = a * b;
S is the area of ​​the rectangle;
a and b – its length and width.
A square has all 4 sides the same.
The area of ​​the square is calculated by the formula:
S = a * a = a ^ 2;
S is the area of ​​the square;
a is the length of the side of the square.
The formula for determining the perimeter of a square is:
P = a + a + a + a = 4 * a;
P is the perimeter of the square;
a is the length of its side.
From the area formula, we derive the length of the side of the square and find its value:
a = √25 cm2 = 5 cm.
The perimeter of the square is:
P = 4 * 5 cm = 20 cm.
Answer: the side of the square is 5 cm, and the perimeter is 20 cm.