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

$C = 2 \pi r$

Where:

• $C$ is the circumference
• $\pi$ is approximately 3.14
• $r$ is the radius of the circle (2.9 inches in this case)

Substituting the values:

$C = 2 \times 3.14 \times 2.9$

$C = 18.212$

Rounding to the nearest hundredth:

$C \approx 18.21 \text{ inches}$

So, the circumference of the circle is approximately 18.21 inches.

Would you like any further explanation or details?

Here are some related questions to consider:

1. How does the formula for the circumference change if the diameter is given instead of the radius?
2. What would the circumference be if the radius were doubled to 5.8 inches?
3. How do you find the area of a circle if you know the radius?
4. What is the relationship between the diameter and the radius of a circle?
5. How would the circumference change if we used a more precise value for $\pi$?

Tip: If you need a more accurate answer for real-world applications, you could use a more precise value for $\pi$, like 3.14159.