If a circle has radius 4, what is its circumference?

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Multiple Choice

If a circle has radius 4, what is its circumference?

Explanation:
Circumference is the distance around the circle, and it equals 2π times the radius. With a radius of 4, compute 2π × 4 = 8π. So 8π is the correct amount. The other numbers correspond to different radii (e.g., a radius of 2 gives 4π, a radius of 3 gives 6π, a radius of 6 gives 12π). You can also use C = πd with diameter 8, which gives π × 8 = 8π, matching the result.

Circumference is the distance around the circle, and it equals 2π times the radius. With a radius of 4, compute 2π × 4 = 8π. So 8π is the correct amount. The other numbers correspond to different radii (e.g., a radius of 2 gives 4π, a radius of 3 gives 6π, a radius of 6 gives 12π). You can also use C = πd with diameter 8, which gives π × 8 = 8π, matching the result.

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