Explanation
The circumference of a circle is given by the formula \(C = 2{\pi}r\) where r is the radius of the circle. The radius of a circle is its diameter divided by two so:
\(r=\frac{d}{2}=\frac{14}{2}=7\)
By definition, \( C = 2{\pi}r \) is approximately 3.14 so:
\(C=2 \pi r=3.14 \times 2 \times 7=3.14 \times 14\)