1. **State the problem:** We are given a circle with a diameter of 8 ft and need to find its circumference. 2. **Formula:** The circumference $C$ of a circle is given by the formula: $$C = \pi d$$ where $d$ is the diameter of the circle. 3. **Apply the formula:** Given $d = 8$ ft, substitute into the formula: $$C = \pi \times 8$$ 4. **Simplify:** $$C = 8\pi$$ 5. **Interpretation:** The circumference of the circle is $8\pi$ ft, which is approximately $8 \times 3.1416 = 25.13$ ft. **Final answer:** $$C = 8\pi \text{ ft} \approx 25.13 \text{ ft}$$