The perimeter of the square is 10 m 72 cm. Find the length of the side of the square.

The perimeter of a square is the sum of the lengths of its sides. A square is a quadrangle in which all sides are equal. Let’s write a formula for the perimeter of a square, denoting the sides with the letter a, and the perimeter with the letter P:
P = a + a + a + a = 4 × a
Let’s bring the perimeter of the square to one unit of measurement. You need to convert 10 m to centimeters. One meter is 100 centimeters.
10 × 100 = 1000 cm.
The perimeter of the square is:
1000cm + 72cm = 1072cm
Substituting the perimeter in the formula, we find the unknown side a:
1072 = 4 × a
a = 1072: 4
a = 268 cm.
Answer: a = 268 cm.