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Circumference of a circle is pi * diameter. Diameter is 2 * radius. So if you know the radius, circumference is 2 * pi * radius. Now choose an appropriate approximation for pi (3.14, or 3.1416, or even the fraction 22/7), depending on your application. This will work for ANY circle, no matter how big or small it is, as long as it's a true circle and not a different elliptical shape, e.g. an oval.
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Earn +20 ptsQ: How do you find a circumference?
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How do find the circumference of a circle?
The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.
If you have your circumference how do you find the diameter?
diameter = circumference/pi
How do you find the diameter of something by its circumference?
You cannot find the diameter of something from its circumference unless it is a circle and, in that case, diameter = circumference/pi
How to find circumference of a circle?
circumference = pi x diameter
How will you find the radius if you only have the circumference?
by timesing the circumference by pie
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