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11-80.

In the triangle at right, DE is a midsegment of ΔABC and FG is a midsegment of ΔADE. If DE = 7 cm, find FG and BC. Homework Help ✎

ΔADE ~ ΔABC

Since D is the midpoint of line AB, 2 ·DB = AB.

FG = 3.5 cm
BC = 14 cm