Okay finding circumference from knowing the radius right? The radius is equal to half the diameter and circumference is equal to pi * diameter. So double the radius and multiply it by 3.14 then you will get the circumference!
multiply the radius by 2, then by pi, where pi is about 3.1416
circumfrence: divide it by π (3.14). Diameter: divide by 2. area: find diameter and divide by 2.
The circumference of a circle = Pi times Diameter. So 3.14159 (roughly) multiplied by the diameter.
Divide the circumference by pi which is 3.14 to find the diameter; then divide the diameter by two to find the radius GOOD LUCK
rx2x3.1416=circumference or diameter x pi=circumference
You multiply the diameter by 3.14 (which is pie) and the end result will be the circumference
Circumference = 2*pi*radius
2*3.14*R r=Radius
Circumference=2*pi*radius
Circumference of a circle = 2*pi*radius
If you know the circumference of a circle, you can find the radius by dividing the circumference by the value of Pi (3.14159...)
Radius (not raduis) =circumference/(2*pi)
radius = circumference/(2*pi)
radius = circumference/2*pi
You can either measure it, or calculate it if you know the diameter (radius = diameter / 2), or the circumference (radius = circumference / (2pi)).
The equation for circumference is C=2(pi)(r) where C is the circumference and r is the radius. You can find the radius by plugging in the circumference into this equation and solving the equation.
Well, if you know the diameter you divide that by two to get the radius.
The circumference of a circle that has a radius of 5 inches is 10 X pi or approximatly 31.415926535897932384626433832795. If you know the radius you can find the circumference by multiplying it by 2(pi)
Where C=circumference, r= radius and d=diameter To find circumference: C=2 x pi x r or you can use the formula C=pi x d To find diameter just multiply the radius by 2 if you know what the radius is. If you do not know the radius, but you know the circumference and need diameter use the following formula: C/pi=d Happy Computing!!!
Divide the circumference by 2PI to find the radius. ( C = 2PI*Radius)