Question

what is the circumference? I have to type a exact answer in terms of π.

Answer 1

$\begin{gathered} \text{circumference of a circle = } \\ 2\times\pi\times r \\ r=7\operatorname{cm} \\ \text{circumference of the circle =} \\ 2\text{ }\times\pi\times7 \\ =14\pi cm \end{gathered}$