Answer: approximately 2yd
Step-by-step explanation:
There are two ways in which you can do this. First, remember the circumference formula.
[tex]C=\pi d[/tex]
Solve for diameter.
[tex]d=\frac{C}{\pi}[/tex]
[tex]d=\frac{12.6yd}{3.14}[/tex]
[tex]d=4[/tex]
Divide the diameter by 2.
[tex]r=\frac{d}{2}=\frac{4}{2} =2[/tex]
