They would have to give you enough information to eventually get the diameter. If they gave you the area of a circle and asked for the circumference, you can determine the radius, and from the radius the diameter, and then the circumference.
If they said "What is the circumference if the area of a circle is 36pi?"
Area of a circle is pi*r2, which would give us a value for r = 6
Diameter is 2*r, or = 12.
Circumference is d*pi, or 12pi
The diameter is (the circumference) divided by (pi) . The radius is 1/2 of the diameter.
To find the radius of a circle with a given circumference, you can use the formula: circumference = 2 * π * radius. Given that the circumference is 26 inches, you can plug this value into the formula and solve for the radius. Dividing the circumference by 2π gives you the radius of the circle, which in this case is approximately 4.14 inches.
If the circumference or diameter is given then you can find the radius or simply measure the distance from the centre of the circle to the circumference.
circumference of a circle = pi*diameter or 2*pi*radius
radius = diameter/2 circumference = 2*pi*radius or pi*diameter area = pi*radius2
Diameter = radius * 2 Circumference = pi * diameter.
Diameter = circumference/pi Radius = circumference/2*pi
pi X diameter finds the circumference so circumference divided by pi will leave the diameter. half the diameter to find the radius
Divide circumference by pi, that gives diameter. Radius is half of diameter
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!
You can either measure it, or calculate it if you know the diameter (radius = diameter / 2), or the circumference (radius = circumference / (2pi)).
If you mean the diameter and radius of a circle given the circumference it is:- diameter = circumference/pi radius = circumference/(2*pi)
circumference of a circle = pi*diameter or 2*pi*radius
Diameter = Radius*2 = 14 units. Circumference = pi*Diameter = 43.98 units.
divide the circumference by pi ( 3.146) which will give you the diameter divide that by 2 and you have the radius
Radius is diameter divided by two. Diameter is radius times two or circumference divided by pi. Circumference is diameter times pi. Pi is roughly 3.14
to calculate circumference you find a circles radius or diameter. you do diameter times pi or radius times 2 times pi. the you have circumference!