If the perimeter of the rectangle is 58 yards, we can use the formula for the perimeter of a rectangle to find the length of one side.
The formula for the perimeter of a rectangle is: Perimeter = 2 * (length + width)
Given that the perimeter is 58 yards and the two missing sides (let's denote them as x) have the same length, we can set up the equation as follows:
58 = 2 * (x + x)
Simplifying the equation:
58 = 2 * 2x
58 = 4x
Now, we solve for x:
x = 58 / 4
x = 14.5
So, the length of one of the missing sides is 14.5 yards.