A gardener has 920 feet of fencing to fence in a rectangular garden. One side of the garden is bordered by a river and so it does not need any fencing. garden bordered by a river Opens externally What dimensions would guarantee that the garden has the greatest possible area? shorter side: 0 Incorrect ft (feet) longer side: 920 Incorrect ft (feet) greatest possible area: 0 Incorrect ft2 (square-feet)