Question

diameter: 8 yd
circumference:

Explanation:

Step1: Recall circumference formula

$C = \pi d$

Step2: Substitute diameter $d=8$ yd

$C = \pi \times 8 = 8\pi$

Step3: Calculate numerical value (if using $\pi\approx3.14$)

$C \approx 8 \times 3.14 = 25.12$

Answer:

$8\pi$ yards (or approximately 25.12 yards)