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
Diameter of the circle: 120/pi = 38.197 inches rounded
This question has already been answered in detail and the answer is 38.83251825 or 39 inches to the nearest foot.
To find the diameter of a circle with a given circumference, you can use the formula: circumference = π * diameter. Given the circumference of 120 inches, you can plug this into the formula: 120 = π * diameter. Solving for diameter, you get diameter = 120 / π ≈ 38.2 inches.
The ratio of a circle's circumference to its diameter is a constant but irrational (meaning its precise value cannot be fully written out using traditional numbers) number called Pi (π). Pi ~= 3.1415927 Circumference = Pi (3.1415927...) * Diameter (120 inches) ~= 376.991118 inches ~= 377 inches
radius = 120/(2*pi) = 19.09859317 cm area = pi*19.098593172 = 1145.91559 or about 1146 square cm
Estimate: 3*40 = 120 inches Actual: pi*39 = 122.5 inches to one decimal place
Circumference will be 120 pi inches, ie 31 feet and very nearly 5 inches
A = pi r2r2 = A/pir2(1/2) = (A/pi)1/2r = (120/pi)1/2r ≈ 6 inC = 2 pi rC = (2)(pi)(6 in)C ≈ 37.7 in
360 degrees in a circle 120 degrees = 12mm 360 degrees = 36mm Therefore the circumference of the circle is 36mm.
A central angle of 120 is one third of the circle, so the arc length of 28.61 is one third of the circumference. 28.61 X 3 = 85.83
Divide the circumference by the value of Pi and divide the result by 2 - that will give you your answer.
1145.9