To find the length of one side of the square garden, we can use the formula for the area of a square, which is:
\[ \text{Area} = \text{side}^2 \]
Given that the area is 205 square feet, we can find the side length by taking the square root of the area:
\[ \text{side} = \sqrt{205} \approx 14.32 \text{ feet} \]
So, the closest approximate length of one of the sides is 13 feet.
Next, to find the perimeter of the garden, we use the formula for the perimeter of a square, which is:
\[ \text{Perimeter} = 4 \times \text{side} \]
Using the side length we found earlier:
\[ \text{Perimeter} \approx 4 \times 14.32 \approx 57.28 \text{ feet} \]
Therefore, the approximate perimeter of the garden, which indicates how much fencing you would need to go around it, is closest to 57 feet of fencing.