Answer:
Step-by-step explanation:
The length of a diagonal of a square is , where a is the length of one side.
If the area of a square garden is 209m, we know that the side length must be m, since the area of a square is it’s side length squared.
Now we can substitute inside the formula.
When multiplying roots, the multiplication problem can simplify down to whatever is in the roots multilpied by each other.
So,
So the length of the diagonal is m.
Hope this helped!