The circumference of a circle can be calculated using the formula:
\[ C = \pi \times d \]
where \(C\) is the circumference and \(d\) is the diameter of the circle.
In this case, the diameter \(d\) is 4 feet. So, we can substitute the value into the formula:
\[ C = \pi \times 4 \text{ feet} \]
Using an approximate value of \(\pi \approx 3.14\), we can calculate:
\[ C \approx 3.14 \times 4 \text{ feet} \approx 12.56 \text{ feet} \]
So, the circumference of the circle is approximately 12.56 feet.
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