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Symmetry - hints need please

  1. Nov 7, 2005 #1
    In a triangle ABC, AB = AC and AD = DB = BC. Find the size of the angle BAD? Find the angles of triangle ABC?

    Just need a few hints to get this problem started please? :redface:
  2. jcsd
  3. Nov 8, 2005 #2

    Tom Mattson

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    Natasha: HallsofIvy responded here with most of the solution. I've soft deleted it and will restore it once you have shown some work on this problem.
    He used analytic geometry and he started as follows:

    You will need to find coordinates of other points and then find equations of the lines that contain the sides of the triangles. Give that a shot and post what you come up with.
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