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Aryang

GEOMETRY QUES: its a good ques,please try it

  • one year ago
  • one year ago

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  1. Aryang
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    |dw:1342192872407:dw| value of x ?

    • one year ago
  2. sOcCeR_fReAk7007
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    I think \[x = 105\] im not sure

    • one year ago
  3. Aryang
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    nop..not the ans.. you have any method or guessing?

    • one year ago
  4. Aryang
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    @ParthKohli @experimentX @eliassaab @jhonyy9 @shubhamsrg @sam

    • one year ago
  5. sOcCeR_fReAk7007
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    Can you get a picture up???

    • one year ago
  6. Aryang
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    i had this drawing..what do you mean by picture up ?

    • one year ago
  7. Aryang
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    @maheshmeghwal9 @mukushla @Romero @ganeshie8

    • one year ago
  8. maheshmeghwal9
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    |dw:1342192775085:dw|

    • one year ago
  9. maheshmeghwal9
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    |dw:1342192880199:dw|

    • one year ago
  10. maheshmeghwal9
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    |dw:1342192995755:dw|

    • one year ago
  11. maheshmeghwal9
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    |dw:1342193136068:dw|

    • one year ago
  12. Aryang
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    altough you're trying to make some progress but leme tell you,,its in vain till now! ;)

    • one year ago
  13. maheshmeghwal9
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    Take each triangle in consideration i think u would get the answer

    • one year ago
  14. Aryang
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    try it..you wont by this method..

    • one year ago
  15. maheshmeghwal9
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    see the last figure properly:) there is ur answer in it u would get 100%

    • one year ago
  16. Aryang
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    an eqn in x and y,,what else do you get ?

    • one year ago
  17. maheshmeghwal9
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    no equation in y only equation in x get the y in the form of x from the last figure

    • one year ago
  18. maheshmeghwal9
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    okay lemme try first:)

    • one year ago
  19. Aryang
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    show me..100 rs and a medal if you are able to! ;)

    • one year ago
  20. anjali_pant
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    are you sure that question is right ? :P

    • one year ago
  21. anjali_pant
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    Actually in this question I am able to form only one equation , which is x-y = 60 ! So not sure, still Iam trying ! :-)

    • one year ago
  22. maheshmeghwal9
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    i also think that in question something is missing otherwise somebody had done it upto now by the way all members are intelligent.

    • one year ago
  23. sOcCeR_fReAk7007
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    @Aryang Can you put an actual picture because I don't understand the drawing. I want to help but I don't understand the drawing. Sorry

    • one year ago
  24. prasannalakshmi
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    x=130

    • one year ago
  25. prasannalakshmi
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    is it ryt...

    • one year ago
  26. shubhamsrg
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    Lets do some construction : A circumcirle around ACB is constructed Now, angle O is 110 degrees, if it were to lie on the circle, it should have been 55 degrees so as to fulfill cyclic quad criteria. Since it is greater than that, it will lie inside the circle. |dw:1342256886064:dw| let BO extend to D and lets join DA and DC. DACB is now a cyclic quad now, <CDB>=<CAB> = 25 also, <BDA>=<BCA>=30 now, <DOC> = 130 , which gives us <DCO> as 25 =>DO = OC similarly, <DOA>=120 , which gives us <DAO> as 30 =>DO = OA =>DO=OA=OC thus <OCA> = <OAC> = 35 =>x= 95 degrees <--ans.. by the way, if you inspect clearly , O is the center of the circle. CASE CLOSED! ;)

    • one year ago
  27. shubhamsrg
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    PARDON ME FOR MY DRAWING ! :p

    • one year ago
  28. Aryang
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    correct <--yet again @shubhamsrg @maheshmeghwal9 you even got 3 medals !! lol.. :D

    • one year ago
  29. anjali_pant
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    is the ans posted by shubhamsrg correct ?

    • one year ago
  30. anjali_pant
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    The method of circumscribing seems fine to me , but can we really assume O to be the centre ?

    • one year ago
  31. phi
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    This problem is unconstrained, and there are many answers for x For example. |dw:1342280867011:dw| all the interior angles of the triangles sum to 180, and the interior angles of the quadrilateral sum to 360.

    • one year ago
  32. anjali_pant
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    can you please explain step by step , the drawing is a bit messy and confusing !

    • one year ago
  33. shubhamsrg
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    @phi ,, can you explain ? o.O

    • one year ago
  34. shubhamsrg
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    @anjali_pant i didnt assume that to be the center..i solved it without considering that fact. i just said that if you inspect further, you can prove O is the center.

    • one year ago
  35. Aryang
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    @anjali_pant yes he's correct as far as i am concerned,, @phi yes..i think you're going wrong somewhere..

    • one year ago
  36. anjali_pant
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    ok thanks people !!! :-)

    • one year ago
  37. phi
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    Are you saying my posted triangle violates the given conditions or is impossible to construct? If so, prove it (it will take you a very long time) the problem with shub's idea is that he chose a point D on the circumcircle such that DOB is a straight line. He introduced a new constraint not in the original problem. If he put D somewhere else on the circle (nothing in the problem prevents this) he would get a different answer for x.

    • one year ago
  38. shubhamsrg
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    @phi am totally confused what you are trying to point out.. i first circumscribed it then got my by extending that line.. maybe construction by hand using protractor and other stuff might help..

    • one year ago
  39. phi
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    You can extend the line so that line DOB is a straight line with D on the circumcircle. However, you could put D elsewhere on the circle so that DOB is not a straight line. If you do, you will get a different answer for x. In other words, because you picked a specific cyclic quadrilateral, you get a specific value for x. But you can pick a different cyclic quadrilateral (agreed?). If you do, you get a different x

    • one year ago
  40. shubhamsrg
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    ok i'll be back to it..

    • one year ago
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