If you refer to a circle, multiply the diameter by pi, which is approximately 3.1416.
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The circumference of a circle with a diameter of 3 meters is: 9.42 meters (diameter x Pi = circumference).
The diameter of a circle with a 3-meter circumference is: 0.9549 meters.
Circumference of a circle = 2*pi*radius or diameter*pi Its diameter = circumference/pi
the formula for the circumference of a circle is pi*diameter. the diameter is 2*radius so if 1.5 is the radius, 3 is the diameter plug 3 into the formula... circumference=3.14*3 circumference=9.42
Take the diameter times pi and you get the circumference. It's 9.4248. 3 pi is 9.4248 units