## Prealgebra (7th Edition)

Circumference = 20$\pi$ yd The approximation of the circumference = 62.8 $yd^{2}$
Circumference = 2 $\times$ $\pi$ $\times$ radius = 2 $\times$ $\pi$ $\times$ r Circumference = 2 $\times$ $\pi$ $\times$ 10 = 20$\pi$ yd The approximation of the circumference = 20 $\times$ (3.14) = 62.8 $yd^{2}$