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A circular lid has a diameter of 12 inches. What is the exact area of the lid? A. 6π square inches B. 12π square inches C. 24π square inches D. 36π square inches
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Dec 16, 2016
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A circular lid has a diameter of 12 inches. What is the exact area of the lid? A. 6π square inches B. 12π square inches C. 24π square inches D. 36π square inches
Mathematics
high-school
Irvin Joao
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Irvin Joao
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The area of any circle is equal to
, where r is the radius.
We know that the diameter is 12. The radius is always half of the diameter, so the radius of our circle must be 6.
Substitute 6 for r in our equation and simplify.
π6² = π6×6 =
36π in²
Sebastian Hoitz
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Dec 22, 2016
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Sebastian Hoitz
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