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Mathematics 20 Online
OpenStudy (anonymous):

A patio in the shape of a semicircle has a diameter of 21 ft. What is the approximate area of the patio, rounded to the nearest square foot? Use 3.14 to approximate pi ? ft2

OpenStudy (igreen):

\(\sf A = \pi r^2\) We're given the diameter, so divide it by 2 to find the radius.

OpenStudy (anonymous):

3.14*10.5*10.5

OpenStudy (igreen):

That is correct.

OpenStudy (igreen):

Now multiply it.

OpenStudy (anonymous):

346.185

OpenStudy (igreen):

Correct

OpenStudy (anonymous):

So just 346

OpenStudy (anonymous):

@iGreen

OpenStudy (igreen):

Yes

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