The answer will depend on what aspect of the circle is 54 inches: its radius or diameter.
Circumference = pi*d = 169.65 inches (to 2 dp)
The answer depends on what the 54 feet measures: the radius, diameter or circumference.
radius = 54/(2*pi)
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
The answer will depend on what aspect of the circle is 54 inches: its radius or diameter.
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
When you have the radius of a circle and you are trying to find the diameter, multiply the radius by two; the answer is the diameter. If you have the diameter and want to find the radius, divide the diameter by two; the answer will be the radius. The diameter is 54 centimeters.
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.
Diameter = 54/pi = 17.18873385 or about 17 inches
Circumference = pi*d = 169.65 inches (to 2 dp)
The answer depends on what the 54 feet measures: the radius, diameter or circumference.
radius = 54/(2*pi)
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
The circle's diameter is 8.291 units.
Divide the diameter by 2 to get the radius. Then use the formula: area = pi x radius2.
54