C = \pi \times \text{diameter} = \pi \times 200 = 200\pi \text{ meters}

Tue, 05 May 2026 06:17:20 +0000

# Understanding the Circumference Formula: C = π × Diameter Explained When it comes to circles, one of the most fundamental calculations you’ll encounter is determining the circumference — the distance around the circle. The formula for circumference is simple yet essential: C = π × D
where
- C is the circumference,
- π (pi) is a mathematical constant approximately equal to 3.14159,
- D is the diameter of the circle. This straightforward equation reveals a beautiful relationship between a circle’s diameter and its perimeter. Let’s dive deeper into how this formula works and why it matters in everyday applications.