Circumference of a Circle Formula |
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| \( C \;=\; 2 \cdot \pi \cdot r \) | ||
| Symbol | English | Metric |
| \( C \) = Circumference | \( in \) | \(mm \) |
| \( \pi \) = Pi | \(3.141 592 653 ...\) | \(3.141 592 653 ...\) |
| \( r \) = Radius | \( in \) | \(mm \) |
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The circumference of a circle is the total length of the boundary or perimeter of the circle. It is the distance you would travel if you were to walk around the circle.
