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Homework Help: The height of a triangle, given 2 vectors and the area

  1. Apr 24, 2010 #1
    1. The problem statement, all variables and given/known data
    Triangle ABC formed by two vectors a = ( 2, 10, 25 ) and b = ( 5, 4, -2 ) attached at a point A.
    The area of the triangle is (81 root 5) / 2
    And I need to find the length of the height AM (AM perpendicular to BC and the point M belongs to the line BC).
    Don't know where to start!


    2. Relevant equations
    Area = 0.5 *h *b
     
  2. jcsd
  3. Apr 24, 2010 #2

    radou

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    Hint: find the magnitude of the difference of the two given vectors first.
     
  4. Apr 24, 2010 #3

    Dick

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