Final answer:
The perimeter of a square with side lengths of 28 cm is calculated using the formula P = 4s, which results in a perimeter of 112 cm.
Step-by-step explanation:
To calculate the perimeter of a square with sides of 28 cm, you can apply the basic formula for the perimeter of a square, which is 4 times the length of one side. The formula can be written as P = 4s, where P is the perimeter and s is the side length of the square. Using this formula:
P = 4 × 28 cm = 112 cm
Therefore, the perimeter of the square is 112 centimeters.