superme485
superme485 superme485
  • 30-06-2017
  • Mathematics
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HELP FAST SO CONFUSED

Find the area of the shaded sector. Leave your answer in terms of π.

HELP FAST SO CONFUSED Find the area of the shaded sector Leave your answer in terms of π class=

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RickyChen
RickyChen RickyChen
  • 30-06-2017
Total area: pi*9^2 = 81pi

Shaded area = Total area / 3, because 120/360 = 1/3

So Shaded area = 81pi/3 = 27pi
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musiclover10045
musiclover10045 musiclover10045
  • 30-06-2017

area of a circle is pi x r^2

r = 9 ft so 9^2 = 81

so the full area in terms of PI is 81PI

 now the shaded area is 120 degrees ( one third of the full area)

120/360 = 1/3


 so divide 81 by 3 = 81/3 = 27

so shaded area is 27PI

Answer Link

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