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Geometry Problem

  1. May 4, 2006 #1
    My reasoning:

    This is a tedious drawing so if you are going to procede I'll thank you in advance. Here is my reasoning for solving this problem.

    Call the intersection of BE and CD point M. Let ADE=x, EDM=y, DEA=z, and DEM=140-z.

    Thus we have the following system of equations:


    This gives me a determinant of zero so this system although I think it is true doesn't tell me anything. Any ideas?

  2. jcsd
  3. May 4, 2006 #2


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    Homework Helper

    Draw a line from E to CB that is parallel to AB, and label F as the point of intersection of this line with CB. Then use the stuff under the heading "Parallel Lines" on this page.
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