Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

stupidinmath

  • one year ago

---

  • This Question is Closed
  1. stupidinmath
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Area of full circle: A = πr² A = π(9)² A = 81π A = 254.4690049

  2. superdavesuper
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    But its not a full circle - its only 240deg....so...

  3. stupidinmath
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah.. subtract it?

  4. stupidinmath
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Or.. idk T.T

  5. superdavesuper
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    How many deg. are there in a full circle?

  6. stupidinmath
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    360

  7. liliegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    @superdavesuper Angle aob measures 120 deg?

  8. superdavesuper
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so what do u think? :)

  9. stupidinmath
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i'm thinking 240 is the answer.. but how.. im not sure

  10. superdavesuper
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    @liliegirl yes...according to the drawing.

  11. superdavesuper
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    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. liliegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    @superdavesuper Area of the sector is 27pi so subtract it from the area of the full circle.... Am I correct?

  13. superdavesuper
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    No need to substract...just a simple ratio and proportion @liliegirl

  14. liliegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    @superdavesuper The area is 54pi?? Just a guess..... :)))

  15. stupidinmath
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the area of full circle minus the unshaded part?

  16. stupidinmath
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Any formula or something?

  17. superdavesuper
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Full circule - 360 deg. shaded - 270 deg.

  18. stupidinmath
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    270 or 240? so complicated

  19. liliegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Shaded is 240..

  20. stupidinmath
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the answer is not 345.53?

  21. liliegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    My answer is 169.65

  22. superdavesuper
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Sorry I miss typed. Shaded is 240 n @liliegirl has the right answer of 54 pi :)

  23. stupidinmath
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I see. @liliegirl how did you get it? :)

  24. liliegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    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
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    should be 120deg....or u can simply multiply the total area by 270/360. either way will work out the same.

  26. liliegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Sorry.. typo error.. haha it should be 120...

  27. stupidinmath
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thank you so much! :)

  28. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.