To find the circumference of a circle, we use the formula:

$C = 2 \pi r$

Given:

• $r = 1$ inch
• $\pi \approx 3.14$

Now, substituting the values:

$C = 2 \times 3.14 \times 1 = 6.28 \text{ inches}$

So, the circumference of the circle is approximately 6.28 inches.

Would you like further explanation on this problem?

Here are some related questions to expand your understanding:

1. What is the formula for the area of a circle?
2. How would the circumference change if the radius were doubled?
3. How is the diameter of a circle related to its radius?
4. If the circumference is known, how can you find the radius?
5. Why is $\pi$ used in the calculation of circles?

Tip: Remember, the diameter of a circle is twice the radius, so you can also calculate the circumference using $C = \pi \times d$.