D
d = 4.5 yd
Calculate the circumference of the circle.

Answer:
C= 14.14 yd
Step-by-step explanation:
The circumference of a circle is equal to the equation
C = 2πr
Since the diameter is 4.5, the radius is 2.25.
Plug the radius into the equation, and solve.
C=2π(2.25)
C= 6.283185307(2.25)
C= 14.137
C= 14.14 yd
I hope this helps!