The circumference $C$ of a circle is calculated using the formula:

$C = \pi \times d$

where:

• $\pi$ is approximately $\frac{22}{7}$,
• $d$ is the diameter of the circle.

Given that the diameter $d = 10$ cm, substituting the values into the formula:

$C = \frac{22}{7} \times 10 = \frac{220}{7} \approx 31.43 \, \text{cm}$

So, the circumference is approximately $31.43 \, \text{cm}$.

Would you like a deeper explanation or have any questions?

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Here are 5 related questions:

1. What would the circumference be if the diameter was 14 cm?
2. How do you calculate the area of a circle using the diameter?
3. What is the relationship between radius and diameter in a circle?
4. How does the value of $\pi$ affect the circumference?
5. Can the formula for circumference be derived from the area of a circle?

Tip: The diameter is always twice the radius in a circle.