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Homework Help: Finding an angle with Picture

  1. Jun 27, 2012 #1
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution

    ivfj8z.jpg

    So angle 1 was giving and through that they found angle 2. I need help on how they found angle 2. The dark red arrow is a vector. This is a physics problem asking for something else but I got stuck here lol.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
    Last edited: Jun 27, 2012
  2. jcsd
  3. Jun 27, 2012 #2
    Add another line parallel to ground intersect x-y origin.
     
  4. Jun 27, 2012 #3

    ehild

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    Homework Helper

    The angles are congruent as their arms are pairwise perpendicular. The red vector is vertical, makes a right angle with the horizontal arm of angle 1. The other arm of angle 2 is perpendicular to the slope which is the other arm of angle 1. See picture: β=90-(90-α)=α.

    ehild
     

    Attached Files:

  5. Jun 29, 2012 #4
    What happend with the x axis? I updated the picture to look better.


    [url=http://postimage.org/][PLAIN]http://s17.postimage.org/h2qbp828v/Untitled.png[/url][/PLAIN]
     
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