To find the circumference of a circle, you can use the formula:
\[ C = \pi \times d \]
where \( C \) is the circumference and \( d \) is the diameter.
Given the diameter \( d = 12 \) inches and using \( \pi \approx 3.14 \), we can calculate the circumference:
\[ C = 3.14 \times 12 \]
Now, multiplying:
\[ C = 37.68 \text{ inches} \]
So, the approximate circumference of the circle is 37.68 inches.