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Emily778

Find the value of x.

  • 10 months ago
  • 10 months ago

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  1. Emily778
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    • 10 months ago
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  2. charlieberzak
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    :P :P :P

    • 10 months ago
  3. Emily778
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    Not the greatest picture in the world.

    • 10 months ago
  4. charlieberzak
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    not hd, huh

    • 10 months ago
  5. Emily778
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    What do you think it is?

    • 10 months ago
  6. charlieberzak
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    but it looks cool, white crystals, me and my uncle went crystal picking and we also found some cool ones... but mine were purple

    • 10 months ago
  7. charlieberzak
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    i have not idea, a crystal lol

    • 10 months ago
  8. Emily778
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    they're a pale pink, actually.

    • 10 months ago
  9. Fazeelayaz
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    rock

    • 10 months ago
  10. Kapt_Crazy
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    ok emily this is another simple one. x is the radius of the circle right.

    • 10 months ago
  11. Emily778
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    yep

    • 10 months ago
  12. Emily778
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    what do I do?

    • 10 months ago
  13. Kapt_Crazy
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    is the 12 the length of the whole line or just up the the point where the line of 9 meets it

    • 10 months ago
  14. Emily778
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    I think it's just where the 9 meets

    • 10 months ago
  15. Kapt_Crazy
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    |dw:1369728122034:dw|

    • 10 months ago
  16. Kapt_Crazy
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    u see the kind of dotted line right. that makes ur triangle and the raduis. so the ans for the dotted line is = x

    • 10 months ago
  17. Kapt_Crazy
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    do u understand

    • 10 months ago
  18. Emily778
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    yes

    • 10 months ago
  19. Kapt_Crazy
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    so what ans did u get

    • 10 months ago
  20. Emily778
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    15.

    • 10 months ago
  21. Kapt_Crazy
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    yeah u right

    • 10 months ago
  22. Emily778
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    ok :) thanks.

    • 10 months ago
  23. Emily778
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    What about this one?

    • 10 months ago
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  24. Emily778
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    @Kapt_Crazy

    • 10 months ago
  25. qweqwe123123123123111
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    The answer to the first problem is not 15.

    • 10 months ago
  26. Emily778
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    i think it's 40.

    • 10 months ago
  27. Kapt_Crazy
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    do u need to calculate the angle

    • 10 months ago
  28. Emily778
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    prove it.

    • 10 months ago
  29. charlieberzak
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    lol what a challenge

    • 10 months ago
  30. qweqwe123123123123111
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    It's an easy one, actually. Since the "9" line is right to the "12" line, you know that it also bisects the "12". Which means that you have a right triangle with a long leg of 9, a short leg of 6, and the hypotenuse of that triangle would be the radius of the circle - which also just happens to be what "x" is.

    • 10 months ago
  31. Kapt_Crazy
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    those angles well be equal because

    • 10 months ago
  32. Emily778
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    so it's 12?

    • 10 months ago
  33. Kapt_Crazy
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    |dw:1369728687803:dw|

    • 10 months ago
  34. qweqwe123123123123111
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    |dw:1369728693846:dw|

    • 10 months ago
  35. Kapt_Crazy
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    |dw:1369728808616:dw|

    • 10 months ago
  36. Emily778
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    is the first one actually 15?

    • 10 months ago
  37. Kapt_Crazy
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    and if the lines are the same length rhss then the angles are the sme

    • 10 months ago
  38. yummydum
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    is the entire line 12, or is half the line 12?

    • 10 months ago
  39. qweqwe123123123123111
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    - "is the first one actually 15?" Which part of "The answer to the first problem is not 15" is giving you problems? Look at my diagram and all will be clear - IF you THINK about it.

    • 10 months ago
  40. Kapt_Crazy
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    qweqwe is right if the line full length is 12. but if it was the full length the would have centerewd the 12 and not had it ofcentered

    • 10 months ago
  41. Kapt_Crazy
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    off centered

    • 10 months ago
  42. yummydum
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    it goes out from the radius perpendicularly, it cant be off-center

    • 10 months ago
  43. Kapt_Crazy
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    |dw:1369729065516:dw|

    • 10 months ago
  44. Kapt_Crazy
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    |dw:1369729144486:dw|

    • 10 months ago
  45. Kapt_Crazy
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    i still believe the ans is 15

    • 10 months ago
  46. qweqwe123123123123111
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    Yes, I see what you're saying, and you may have a valid point. And if the picture is drawn to scale, then your argument is further supported. So if the long leg is 12, then the radius is indeed a nice, neat 15.

    • 10 months ago
  47. Kapt_Crazy
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    yeah else it would be 10. sumthing

    • 10 months ago
  48. Fazeelayaz
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    sqrt117 36+81=117

    • 10 months ago
  49. qweqwe123123123123111
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    Yeah, a far less than neat 10.82 or so. :-)

    • 10 months ago
  50. Fazeelayaz
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    are there any details aabout the length AB and CD are they given equal in question

    • 10 months ago
  51. qweqwe123123123123111
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    I'm gonna go with Kapt_Crazy on this one and say that the radius IS 15 for the first problem, based on the offset "12". But it sure would help if the producers of these diagrams would make things unambiguous for the viewers. On the last problem a leg was found based on the assumption that a particular line was tangent, without the problem giving any clues that it was. And as for the second problem, the 2 chords have hash marks which means they're congruent. If the 2 chords are congruent, then so are the angles they subtend, so x=40

    • 10 months ago
  52. phi
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    **. If the 2 chords are congruent, then so are the angles they subtend, so x=40 this follows from the two triangles being congruent by side-side-side: (radius, radius, = chord). therefore by corresponding parts of congruent triangles, the central angles are congruent.

    • 10 months ago
  53. Emily778
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    Thanks y'all

    • 10 months ago
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