0
It is not clear whether the circumference is 9 feet and you want the radius or diameter, or you have either the radius or diameter - which is 9 ft - and you want the circumference.
The formulas are
Circumference = 2*pi*r = 2*pi*d
where r is the radius, d the diameter, and pi is the mathematical constant approximated by 3.14159
Add your answer:
Earn +20 pts
Which equation can be used to find the circumference of a circle with a radius that measures 10 feet?
Circumference = 2*Ï€*radius = 20*Ï€ feet
What is the circumference of a circle 2 m radius?
By using the equation 2πr that is used to find the circumference, you get 12.56m
Which equation could be used to find the circumference of a ball with a radius of 5 inches?
The circumference of a circle equals 2 times pi times the radius, in this case, about 31.42 inches.
What is the reason for pi?
In Geometry, pi lets us determine a circle's circumference if we know the circle's diameter (or radius, which is half the circle's diameter). We can determine this because the circumference is always pi (~3.14) times larger than the diameter of the circle. So, if the diameter of a circle is 1 foot, we know the circumference is 1 ft x pi which is approximately 3.14 feet. The formula for circumference is C = 2 x pi x r. Multiplying the 2 and the r (radius) in that equation gives you the length of the diameter of the circle, so the equation can be rewritten as C = pi x d which is what I used in the example in the last paragraph. Pi is also used to find the area of a circle by using the equation A=pi x r2. Calculus was used to create that formula which is beyond the scope of this explanation.
What formula is used to find the circumference when you know the radius?
Circumference=2*pi*radius
Which equation can be used to find the circumference of a circle with a radius that measures 10 feet?
Circumference = 2*Ï€*radius = 20*Ï€ feet
What is the circumference of a circle 2 m radius?
By using the equation 2πr that is used to find the circumference, you get 12.56m
What equation could best be used to find the circumference of the tire in inches?
C=mc2
What is the diameter of a circle is 4 cm. Which equation can be used to find its circumference?
Circumference of circle: 4*pi = 12.566 cm to 3 decimal places
Which equation could be used to find the circumference of a ball with a radius of 5 inches?
The circumference of a circle equals 2 times pi times the radius, in this case, about 31.42 inches.
Which equation can be used to find the diameter of a circle that has a circumference of 34.54 centimeters?
This one: diameter (d) = circumference (c) divided by 3.1416 (Pi)So, 34.54 (c) / 3.1416 (Pi) = (d) about 11 cm
What formula is used to find the diameter when you know the circumference?
Pi X D = Circumference. To find Diamater if you know Circumference, divide Circumference by Pi (3.14).
What is the reason for pi?
In Geometry, pi lets us determine a circle's circumference if we know the circle's diameter (or radius, which is half the circle's diameter). We can determine this because the circumference is always pi (~3.14) times larger than the diameter of the circle. So, if the diameter of a circle is 1 foot, we know the circumference is 1 ft x pi which is approximately 3.14 feet. The formula for circumference is C = 2 x pi x r. Multiplying the 2 and the r (radius) in that equation gives you the length of the diameter of the circle, so the equation can be rewritten as C = pi x d which is what I used in the example in the last paragraph. Pi is also used to find the area of a circle by using the equation A=pi x r2. Calculus was used to create that formula which is beyond the scope of this explanation.
What formula is used to find the circumference when you know the radius?
Circumference=2*pi*radius
How is pi used to find circumference of circles?
Pi times the diameter of a circle gives its circumference.
Which equation can be used to find the circumference c of a circle with radius 9x?
r=9x d=2r | d=18x c=pi*d | c=pi*18x ~ 56.549x
How is pi used in bakery?
it can be used to help find the circumference of a pie.
