First we have to find the radius:
pi*radius2 = 120 sq ins
Divide both sides by pi and then square root both sides:
radius = 6.180387232 inches
circumference = 2*pi*radius
circumference = 38.83251825 or 39 inches to the nearest inch.
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Diameter of the circle: 120/pi = 38.197 inches rounded
It will be 1/3 of the circle's circumference
Circumference of circle = 2 x pi x r where r is the radius. So we have here 120 = 2 x pi x r or 60 = pi x r or 60 = 3.1415 x r, Hence r = 60/3.1415 = 19.099 Area of circle is pi x r x r, here it is 3.1415 x 19.099 x 19.099 = 1145.93 square feet
An arc length of 120 degrees is 1/3 of the circumference of a circle
The area of a sector in a circle if the radius is 4 cm and the arc has degree 120 is: 16.76 cm2