Given : the diameter of the circle = d = 29 cm
The circumference =
[tex]2\pi\cdot r=\pi\cdot d[/tex]The exact circumference of the circle =
[tex]29\pi[/tex]The approximate circumference of the circle :
[tex]\begin{gathered} \pi\approx3.14 \\ circumference=3.14\cdot29=91.06 \end{gathered}[/tex]