What is the area of a circle with diameter 8?

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Multiple Choice

What is the area of a circle with diameter 8?

Explanation:
Area of a circle is π times the radius squared, and the radius is half the diameter. With a diameter of 8, the radius is 4. So the area is π × 4^2 = 16π. The other numbers come from circles with different radii: a smaller radius gives 4π, a larger one gives 32π, etc., which don’t match a diameter of 8. So 16π is the correct area.

Area of a circle is π times the radius squared, and the radius is half the diameter. With a diameter of 8, the radius is 4. So the area is π × 4^2 = 16π. The other numbers come from circles with different radii: a smaller radius gives 4π, a larger one gives 32π, etc., which don’t match a diameter of 8. So 16π is the correct area.

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