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Mathematics 13 Online
OpenStudy (eg145341):

Can someone check this please?

OpenStudy (eg145341):

jimthompson5910 (jim_thompson5910):

\[\Large 3\pi\] is incorrect

jimthompson5910 (jim_thompson5910):

what did you get for the area of the whole circle?

OpenStudy (eg145341):

I just did 30/360 * (pi)12^2 and got 3.

jimthompson5910 (jim_thompson5910):

ok ignore the pi since that's already part of the answer

jimthompson5910 (jim_thompson5910):

12^2 = 144

jimthompson5910 (jim_thompson5910):

and 30/360 = 1/12

jimthompson5910 (jim_thompson5910):

so 30/360 * 12^2 = (1/12)*144 = 144/12 = 12

jimthompson5910 (jim_thompson5910):

making the final answer to be 12pi

OpenStudy (jdoe0001):

\(\large \textit{area of a sector of a circle}=\cfrac{\theta \pi r^2}{360}\qquad \begin{array}{llll} \theta=\textit{angle in degrees}\\ r=radius \end{array}\)

jimthompson5910 (jim_thompson5910):

I'm not sure how you got 3

OpenStudy (eg145341):

I just used my calculator.

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