Final answer:
To find the length of one side of a square with a perimeter of 21 meters, divide the perimeter by 4. The length of one side is 5.25 meters.
Step-by-step explanation:
The question asks us to find the length of one side of a square when its perimeter is given as 21 meters. To solve this, we recall that the perimeter of a square is the sum of all its four sides. Since all sides of a square are equal in length, we can create the equation 4 × (length of one side) = 21 meters. We solve for the length of one side by dividing the perimeter by 4.
So, the calculation would be:
Length of one side = Perimeter ÷ 4
Length of one side = 21 meters ÷ 4
Length of one side = 5.25 meters
Therefore, the length of one side of the square is 5.25 meters.