Question: If a pizza has a diameter of 8 inches, what is the circumference and how do I find it?
1. **State the problem:** We need to find the circumference of a pizza with a diameter of $8$ inches.
2. **Formula:** The circumference $C$ of a circle is given by the formula:
$$C = \pi \times d$$
where $d$ is the diameter.
3. **Apply the formula:** Substitute $d = 8$ into the formula:
$$C = \pi \times 8$$
4. **Calculate:**
$$C = 8\pi$$
This is the exact circumference in terms of $\pi$.
5. **Approximate:** Using $\pi \approx 3.1416$,
$$C \approx 8 \times 3.1416 = 25.1328$$
6. **Answer:** The circumference of the pizza is approximately $25.13$ inches.
**Summary:** To find the circumference, multiply the diameter by $\pi$.