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Euclidean Theorem

  1. Mar 31, 2010 #1
    What is the famous theorem in Euclidean geometry that states that the sum of the interior angles of a triangle is 180 degrees?
     
    Last edited: Mar 31, 2010
  2. jcsd
  3. Apr 1, 2010 #2

    Mark44

    Staff: Mentor

    AFAIK it doesn't have a name.
     
  4. Apr 1, 2010 #3
    Do you know what the theorem states?
     
  5. Apr 1, 2010 #4

    Mark44

    Staff: Mentor

    It says pretty much what you said - that the sum of the interior angles of a triangle is 180 degrees.
     
  6. Apr 1, 2010 #5
    How could use the theorem to determine the sum of the angles of a convex quadrilateral?
     
  7. Apr 1, 2010 #6

    Office_Shredder

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Try connecting two opposite corners of the quadrilateral with a line
     
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