Well this depends on If the radius is 40 inches or If 40 inches is the entire diameter.
Circumference is determined using the formula Pi x Radius²
Assuming 40 is only a radius it would be 3.14 x 40² or 3.14 x 1600 = 5024 inches
If 40 inches is the entire diameter then its simply Pi x Diameter since the entire diameter is the radius squared. 3.14 x 40 = 125.6 inches.
radius = 40/(2*pi) in inches
The circumference of a circle is calculated using the formula C = πd, where C is the circumference, π is a constant approximately equal to 3.14159, and d is the diameter of the circle. In this case, the diameter is given as 80 inches. Plugging this value into the formula, we get C = π(80) = 251.327 inches. Therefore, the circumference of the circle with a diameter of 80 inches is approximately 251.327 inches.
radius X 2 X pi = circumference 40 x 2 x 3.14 = 251.2"
7.227
7 foot circumference X 12 inches/foot = 84 inches in circumference
The circumference of a circle, if the diameter is 40 inches, is about 125.7 inches. (C = d x Pi).
radius = 40/(2*pi) in inches
80 pi inches
Circumference = pi*Diameter So D = C/pi = 40/pi = 12.732 inches (to 3 dp)
1256 inches ++ Another Answer ++ The formula for finding the Circumference of a circle is C = Pi x D where D is Diameter and Pi is 3.1416. The Radius of a circle is one-half of the Diameter, hence the Diameter of a circle with a 20-inch Radius is 40 inches. Using the formula above, multiply 40 x 3.1416 to find the Circumference: 40 x 3.1416 = 125.664 inches.
The circumference of a circle is calculated using the formula C = πd, where C is the circumference, π is a constant approximately equal to 3.14159, and d is the diameter of the circle. In this case, the diameter is given as 80 inches. Plugging this value into the formula, we get C = π(80) = 251.327 inches. Therefore, the circumference of the circle with a diameter of 80 inches is approximately 251.327 inches.
radius X 2 X pi = circumference 40 x 2 x 3.14 = 251.2"
7.227
7 foot circumference X 12 inches/foot = 84 inches in circumference
The formula to figure out the circumference of a circle is C=2(pi)r. So with a circle that has a radius of 40 inches, you can set up the formula like: C=2(pi)40. To figure this out on a calculator, multiply 2 with pi and then multiply that answer with 40. If you do not have a pi symbol on your calculator you can multiply 2 with 3.14159 then multiply that answer with 40.
about 12.57 inches
A circumference of 6.28 inches measures exactly 6.28 inches!