What is the perimeter of a square with a side length of 5 cm?

To find the perimeter of a square, you can use the formula:

[

\text{Perimeter} = 4 \times \text{side length}

]

In this case, the side length of the square is given as 5 cm. Substituting this value into the formula:

[

\text{Perimeter} = 4 \times 5 , \text{cm} = 20 , \text{cm}

]

This calculation shows that the perimeter of the square is 20 cm. The perimeter effectively measures the total distance around the square, which is why multiplying the side length by 4 is appropriate, as there are four sides of equal length in a square.

The other options do not represent the correct calculation for the perimeter based on the given side length.