Answer:
Step-by-step explanation:
The ratio everything is 1:2. DE joins two midpoints. There are many properties involved in saying that. The most important for this question is that DE = 1/2 BC
That means that the sides in the small upper triangle (ADE) are 1/2 the size of the sides in the larger triangle.
So if DE = 8 then BC must be twice as big or BC = 16
