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is the midsegment of , shown below. What is the perimeter of ?
Triangle A,C,D, with midpoint on side A,C, labeled, B, & midpoint on side, A,D, labeled, e. Sides on triangle A,B,E, labeled as follows: A,B, 7, A,E, 6, B,E, 11.

The perimeter of because the midsegment cuts the sides in half.