Explanation Formula used: Area of a circle, A = π r 2 . Circumference of a circle, C = π d o r C = 2 π r . Calculation: The radius of the circle is 12 ft. Use π key on the calculator to find the area and circumference as follows. Substitute r = 12 in A = π r 2 , A = π r 2 = π ( 12 ) 2 ≈ 452.389 ≈ 452.4 The area of the circle is 452

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Chapter 8.4, Problem 5BE

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The circumference and area of the circle if its radius is 12 ft. Use π key on the calculator and round the result to the nearest tenth.

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The circumference and area of the circle if its radius is 12 ft. Use π key on the calculator and round the result to the nearest tenth.

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The circumference and area of the circle if its radius is 12 ft. Use π key on the calculator and round the result to the nearest tenth.

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