The circumference of a circle can be found by multiplying the diameter by pi (Ï€).
Given that the diameter is 4 feet, the circumference can be calculated as:
Circumference = Diameter * π
Circumference = 4 feet * π
Circumference ≈ 12.57 feet
Therefore, the circumference of a circle with a diameter of 4 feet is approximately 12.57 feet.