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There are 2 formulas for finding the circumference of the circle.If the radius diameter is given,we use the formula �d.When the radius is given,we use the formula 2�R.
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But there are also other formulae for when the area is given, or the length of an arc and the angle subtended at the centre or on the circumference are known. Plus many more. Basically, the question is too poorly specified to find a single answer.
Also, the above formulae assume that the shape is a circle. But it could be an ellipse, for example.
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Formula for circumference of a circle?
Circumference of a circle:Formula= diameter * pi (approx 3.14)
What is the formula to find the circumference of a circle with the diameter given?
Circumference = (diameter) multiplied by (pi)
What is the formula for finding the radius of a circle when you have the circumference?
Divide the circumference by 2*pi because 2*pi*radius = circumference
What is the circumference of an 18 cm circle?
The circumference is about 56.548 cmUse this formula for future calculations: diameter x 3.1416 (Pi) = circumference
The formula for circumference of a cirle is?
pi*radius squared
