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Instead of "square footage", those who are comfortable with their math almost

always call it "area". After all, it could be square inches, square meters, or acres.

Each of those would still be 'area', even though none of them is 'square footage'.

Area of a circle = (pi) x (radius)2

Radius = 1/2 of the diameter

Area of your circle = (pi) x (22.5)2 = 506.25 (pi) = 1,590.43 square feet (rounded)

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Q: What is the square footage of a circle with a diameter of 45 feet?
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