If the diameter is 3 meters, that means it measures 3 meters from one edge of a circle or sphere to the opposite edge, passing through the center. In this case, the radius would be 1.5 meters, which is half of the diameter.
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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.
A cylinder that has a diameter of 10 meters and a height of 3 meters has a surface area of 251.33m2
The diameter is 19.05 mm so shift the decimal point 3 places to the left for meters.
Circumference is equal to 2 times pi times the radius. The radius is half the diameter, so pi times the diameter is also the circumference. In this case, the diameter is 3 meters so 3 times pi equals 9.42 So the circumference is about 9.42 meters.