Circumference of a circle with diameter 8 is?

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Multiple Choice

Circumference of a circle with diameter 8 is?

Explanation:
The circumference of a circle is linked to its size by C = πd when using the diameter, or C = 2πr when using the radius. Here the diameter is 8, so C = π × 8 = 8π. You can double-check with the radius: radius is 4, and C = 2πr = 2π × 4 = 8π. This matches. The other numbers come from mixing up the formula or dropping π (for example, using 2r without π would give 8, not 8π).

The circumference of a circle is linked to its size by C = πd when using the diameter, or C = 2πr when using the radius. Here the diameter is 8, so C = π × 8 = 8π. You can double-check with the radius: radius is 4, and C = 2πr = 2π × 4 = 8π. This matches. The other numbers come from mixing up the formula or dropping π (for example, using 2r without π would give 8, not 8π).

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