Calculate the circumference of a circle given its radius in different units

To calculate the circumference of a circle, we use the formula:

$ C = 2\pi r $

If the radius $r$ is given in meters (m), and the radius is 5 meters, then the circumference is:

$ C = 2 \pi \times 5 = 10\pi \text{ meters} $

If the radius is given in centimeters (cm), and the radius is 50 centimeters, then the circumference is:

$ C = 2 \pi \times 50 = 100\pi \text{ centimeters} $

If the radius is given in kilometers (km), and the radius is 0.005 kilometers, then the circumference is:

$ C = 2 \pi \times 0.005 = 0.01\pi \text{ kilometers} $

The formula for the circumference $C$ of a circle is:

$ C = 2pi r $

To find the circumference if the radius $r$ is 5 meters:

$ C = 2 pi imes 5 = 10pi ext{ meters} $

To find the circumference if the radius is 50 centimeters:

$ C = 2 pi imes 50 = 100pi ext{ centimeters} $

To find the circumference if the radius is 0.005 kilometers:

$ C = 2 pi imes 0.005 = 0.01pi ext{ kilometers} $

The formula for the circumference is:

$ C = 2pi r $

For a radius of 5 meters:

$ C = 10pi ext{ meters} $

For a radius of 50 centimeters:

$ C = 100pi ext{ centimeters} $

For a radius of 0.005 kilometers:

$ C = 0.01pi ext{ kilometers} $

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