Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

msingh Group Title

two equal circles of radius 5 cm have two common tangent AB and CD which touch the circle on A, C and B, D respectively and if CD = 24 cm, find the length of AB.

  • one year ago
  • one year ago

  • This Question is Closed
  1. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1358505912245:dw|

    • one year ago
  2. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    interesting :)

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

    can i know what did you attempt here?

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

    can i know what was your attempt here?

    • one year ago
  5. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    in a traingle bcd, i apply pythagoras theorem

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

    CD^2=BC^2+BD^2

    • one year ago
  7. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    but how you got CD?

    • one year ago
  8. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    it is given

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

    24^2=BC^2+5^2

    • one year ago
  10. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ok

    • one year ago
  11. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ok you see for getting AB we need to take one more triangle.can you tell which one that will be?

    • one year ago
  12. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i don't know

    • one year ago
  13. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    • one year ago
    1 Attachment
  14. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    well try to think of a triangle containing AB

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

    a right angled one

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

    plse see this diagram..

    • one year ago
  17. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yep i saw

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

    do u think taking a triangle BCD is right

    • one year ago
  19. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    okay...wait ..the other triangle be ABC.

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

    wait a sec...

    • one year ago
  21. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    to make things clear join OB

    • one year ago
  22. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    where O is centre

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

    k

    • one year ago
  24. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    in btw hw did u get bcd as rt angled ? :P

    • one year ago
  25. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    that's why i m saying i m wrong , we can't take tr.BCD

    • one year ago
  26. Anuska Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ob n od shld b joined

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

    yeh :)

    • one year ago
  28. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    join OA also

    • one year ago
  29. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i will try my best to draw that

    • one year ago
  30. Anuska Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yea thn tk d triangle AOD

    • one year ago
  31. Anuska Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    & thn apply d theorem

    • one year ago
  32. Anuska Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ad^2= oa^2+od^2

    • one year ago
  33. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @msingh i hand over this one to her :) seeya

    • one year ago
  34. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    k

    • one year ago
  35. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    vat is value of AD and OA

    • one year ago
  36. Anuska Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    oa is 5

    • one year ago
  37. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    how

    • one year ago
  38. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    OA is not a radius

    • one year ago
  39. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    well msing we need to use property of tangents from same point i guess

    • one year ago
  40. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    lemme try this on properly ...

    • one year ago
  41. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    *on paper

    • one year ago
  42. sirm3d Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    draw a segment joining the centers.

    • one year ago
  43. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1358508030734:dw|

    • one year ago
  44. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    nice one @sirm3d

    • one year ago
  45. sirm3d Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    |dw:1358508121964:dw|

    • one year ago
  46. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    isnt OO'=AB @sirm3d ?

    • one year ago
  47. sirm3d Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    that's right. O'O = AB

    • one year ago
  48. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ABOO' is a rectangle it seems

    • one year ago
  49. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    my first attempt on this question wasnt as succesful as i thought .well this one was nice :)

    • one year ago
  50. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @msingh any doubts here?

    • one year ago
  51. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    when the triangle are congruent, vat after that

    • one year ago
  52. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    AO'=BO =5cm CD=24cm

    • one year ago
  53. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    find OO' using that !!

    • one year ago
  54. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    CP= CD/2=24/2=12

    • one year ago
  55. sirm3d Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    OP=12 because the triangles O'CP and ODP are congruent

    • one year ago
  56. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    k

    • one year ago
  57. sirm3d Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    oops. i meant CP=DP =12

    • one year ago
  58. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Find OP 2OP =OO'

    • one year ago
  59. sirm3d Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    use pythagorean theorem to find the length of hypotenuse OP of triangle ODP

    • one year ago
  60. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    O'P =13cm

    • one year ago
  61. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    OO' = 26cm=AB

    • one year ago
  62. sirm3d Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    right you are!

    • one year ago
  63. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    :) WELL DONE

    • one year ago
  64. msingh Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    thank u @AravindG and @sirm3d

    • one year ago
  65. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yw :)

    • one year ago
  66. AravindG Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i liked @sirm3d novelty :P

    • one year ago
  67. sirm3d Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    yw.

    • one year ago
    • Attachments:

See more questions >>>

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.