The answer depends on what the 54 feet measures: the radius, diameter or circumference.
The circumference of a 54 foot circle is: 169.6 feet.(C = d x Pi)
The answer will depend on what aspect of the circle is 54 inches: its radius or diameter.
r = ~8.594 cm
C=π x diameter (or twice the radius) 54 = π x d d = 54/π d=17.188733853924696263039446444232 in r=d/2 r = 8.5943669269623481315197232221158 in
Radius of a circle = circumference/(2*pi)
The answer depends on what the 54 feet measures: the radius, diameter or circumference.
The circumference of a 54 foot circle is: 169.6 feet.(C = d x Pi)
The answer will depend on what aspect of the circle is 54 inches: its radius or diameter.
r = ~8.594 cm
54 cm
Since your circle has a diameter of 9 feet (the definition of a "9 by 9" circle), the radius is half of that distance. In this case, your radius is 4.5 feet or 54 inches.
54 feet
It depends on what you mean by a certain size circle. If the certain size is the diameter, then the answer is 54 inches. If the certain size is the radius, then the answer is 108 inches. If the certain size is the circumference, then the answer is 54 / 3.14159 or about 17.19 inches
C=π x diameter (or twice the radius) 54 = π x d d = 54/π d=17.188733853924696263039446444232 in r=d/2 r = 8.5943669269623481315197232221158 in
Circumference=Diameter * PiDiameter= Radius *2Radius=(Circumference/Pi)/254/Pi=17.1887338517.18873385/2=8.594366927
Circumference = pi x 2 x r = 3.1415 x 2 x 27 = 3.1415 x 54 = 169.641 inches