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27-02-2019
Mathematics

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What is the exact area of a circle with a diameter of 18 feet using pi

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wegnerkolmp2741o wegnerkolmp2741o

27-02-2019

Answer:

A = 81 pi ft^2

Step-by-step explanation:

The area of a circle is given by

A = pi r^2

r is d/2

r = 18/2

r =9

We need to leave pi as pi since we are asked for the exact answer

A = pi 9^2

A = 81 pi ft^2

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