Hey tavi033.

Try extending the line (the red line) up to the top side of the triangle to get the angle formed between the red line and the top blue line and then use geometry to get the angles formed inside of the new triangle (the one with the different angle).

After you do this you can solve for the points (in terms of a, b, and c) and compare them in terms of the original triangle formed by (a,b,c).