We are tasked with finding the circumference of a circle when the diameter is $86 \, \text{m}$. The formula for the circumference of a circle is:

$C = \pi \cdot d$

Where:

• $C$ is the circumference,
• $d$ is the diameter,
• $\pi$ is approximately $3.14159$.

Step 1: Plug in the diameter

$C = \pi \cdot 86$

Step 2: Calculate $C$

Using $\pi \approx 3.14159$: $C = 3.14159 \cdot 86 \approx 270.176$

Step 3: Round to the nearest whole number

$C \approx 270 \, \text{m}$

Final Answer:

$\boxed{270 \, \text{m}}$

Would you like additional details or have any questions?

Related Questions:

1. How is the formula for the circumference derived from the circle's properties?
2. What is the relationship between the radius and the diameter of a circle?
3. How do we calculate the area of a circle given the diameter?
4. Why is $\pi$ an irrational number, and how does it affect calculations?
5. How does rounding affect precision in real-world measurements?

Tip:

Always keep multiple decimal places in intermediate calculations to avoid rounding errors until the final step.