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Angle x

  1. Jun 21, 2009 #1
    I need help with this one.

    http://f.imagehost.org/view/0726/decide [Broken]
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Jun 21, 2009 #2


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    I suggest first looking at the triangle of which two of the angles are given to be 10,6 and 71,9.

    What do you know about the sum of the angles of a triangle and a quadrilateral ("quadrangle" :wink:)?
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