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If the circle is 20 ft radius, the area is π·20² = 1256.637 ft²

If the circle is 20 ft diameter, the area is π·(20/2)² = 314.1593 ft²

If the circle is 20 ft circumference, the are is π·(20/2π)² = 63.66198 ft²

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Q: What is the square foot of a circle that is 20 foot?
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