



 
Leeja, Stewart's Theorem applied to a median of a triangle is what you will want to use here: If m is the median to the side whose length is a, while b and c are the lengths of the sides attached to one end of the median, then 4m^{2} = 2b^{2} + 2c^{2}  a^{2}. You will also need Pythagoras and the fact that the medians of a triangle intersect 2/3 of the way from a vertex to the midpoint of the opposite side. Chris  


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