anonymous
  • anonymous
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Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
Area of full circle: A = πr² A = π(9)² A = 81π A = 254.4690049
superdavesuper
  • superdavesuper
But its not a full circle - its only 240deg....so...
anonymous
  • anonymous
yeah.. subtract it?

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anonymous
  • anonymous
Or.. idk T.T
superdavesuper
  • superdavesuper
How many deg. are there in a full circle?
anonymous
  • anonymous
360
anonymous
  • anonymous
@superdavesuper Angle aob measures 120 deg?
superdavesuper
  • superdavesuper
so what do u think? :)
anonymous
  • anonymous
i'm thinking 240 is the answer.. but how.. im not sure
superdavesuper
  • superdavesuper
@liliegirl yes...according to the drawing.
superdavesuper
  • superdavesuper
No, the shaded area is a PORTION of a full circle...u already calculated the area for a full circule...so what portion is shaded?
anonymous
  • anonymous
@superdavesuper Area of the sector is 27pi so subtract it from the area of the full circle.... Am I correct?
superdavesuper
  • superdavesuper
No need to substract...just a simple ratio and proportion @liliegirl
anonymous
  • anonymous
@superdavesuper The area is 54pi?? Just a guess..... :)))
anonymous
  • anonymous
the area of full circle minus the unshaded part?
anonymous
  • anonymous
Any formula or something?
superdavesuper
  • superdavesuper
Full circule - 360 deg. shaded - 270 deg.
anonymous
  • anonymous
270 or 240? so complicated
anonymous
  • anonymous
Shaded is 240..
anonymous
  • anonymous
the answer is not 345.53?
anonymous
  • anonymous
My answer is 169.65
superdavesuper
  • superdavesuper
Sorry I miss typed. Shaded is 240 n @liliegirl has the right answer of 54 pi :)
anonymous
  • anonymous
I see. @liliegirl how did you get it? :)
anonymous
  • anonymous
You have to get the area of the unshaded part.. that is a sector... Area of the sector is \[\pi(9^{2})(180)\div360\] which is 27pi... Then subtract from the area of the full circle (81pi) You'll come up with 54pi. :))
superdavesuper
  • superdavesuper
should be 120deg....or u can simply multiply the total area by 270/360. either way will work out the same.
anonymous
  • anonymous
Sorry.. typo error.. haha it should be 120...
anonymous
  • anonymous
thank you so much! :)

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