The meaning of circumference is to find the distance around a circle or in other words the perimeter of the circle. The circumference of a circle can be calculate by using the formula C=2πr or C=πd.
In this exercise is given that a circle has a diameter of 25 yards, and it is asked to find its circumference. In this problem the diameter of the circle is given, so in this case the formula C=πd would be used, where d represents the diameter.
C=πd
C=π(25 yards)
C=78.5 yards
The circumference of the circle is 78.5 yards.