If the radius of a circle is 7 units, what is the area?

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Multiple Choice

If the radius of a circle is 7 units, what is the area?

Explanation:
Area of a circle is found with A = πr^2. With a radius of 7 units, A = π × 7^2 = π × 49 = 49π square units. The number 14π would be the circumference, since C = 2πr = 14π for r = 7. The value 7π is π times the radius, not an area, and 343π uses r^3, which isn’t applicable for area. So the area is 49π.

Area of a circle is found with A = πr^2. With a radius of 7 units, A = π × 7^2 = π × 49 = 49π square units. The number 14π would be the circumference, since C = 2πr = 14π for r = 7. The value 7π is π times the radius, not an area, and 343π uses r^3, which isn’t applicable for area. So the area is 49π.

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