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anonymous

  • 2 years ago

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  1. anonymous
    • 2 years ago
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    Area of full circle: A = πr² A = π(9)² A = 81π A = 254.4690049

  2. superdavesuper
    • 2 years ago
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    But its not a full circle - its only 240deg....so...

  3. anonymous
    • 2 years ago
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    yeah.. subtract it?

  4. anonymous
    • 2 years ago
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    Or.. idk T.T

  5. superdavesuper
    • 2 years ago
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    How many deg. are there in a full circle?

  6. anonymous
    • 2 years ago
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    360

  7. anonymous
    • 2 years ago
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    @superdavesuper Angle aob measures 120 deg?

  8. superdavesuper
    • 2 years ago
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    so what do u think? :)

  9. anonymous
    • 2 years ago
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    i'm thinking 240 is the answer.. but how.. im not sure

  10. superdavesuper
    • 2 years ago
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    @liliegirl yes...according to the drawing.

  11. superdavesuper
    • 2 years ago
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    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?

  12. anonymous
    • 2 years ago
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    @superdavesuper Area of the sector is 27pi so subtract it from the area of the full circle.... Am I correct?

  13. superdavesuper
    • 2 years ago
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    No need to substract...just a simple ratio and proportion @liliegirl

  14. anonymous
    • 2 years ago
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    @superdavesuper The area is 54pi?? Just a guess..... :)))

  15. anonymous
    • 2 years ago
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    the area of full circle minus the unshaded part?

  16. anonymous
    • 2 years ago
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    Any formula or something?

  17. superdavesuper
    • 2 years ago
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    Full circule - 360 deg. shaded - 270 deg.

  18. anonymous
    • 2 years ago
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    270 or 240? so complicated

  19. anonymous
    • 2 years ago
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    Shaded is 240..

  20. anonymous
    • 2 years ago
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    the answer is not 345.53?

  21. anonymous
    • 2 years ago
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    My answer is 169.65

  22. superdavesuper
    • 2 years ago
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    Sorry I miss typed. Shaded is 240 n @liliegirl has the right answer of 54 pi :)

  23. anonymous
    • 2 years ago
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    I see. @liliegirl how did you get it? :)

  24. anonymous
    • 2 years ago
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    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. :))

  25. superdavesuper
    • 2 years ago
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    should be 120deg....or u can simply multiply the total area by 270/360. either way will work out the same.

  26. anonymous
    • 2 years ago
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    Sorry.. typo error.. haha it should be 120...

  27. anonymous
    • 2 years ago
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    thank you so much! :)

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