Since is the midsegment of , D and E are the midpoints of the segments  and  .

Use midpoint formula to determine D and E.

The midpoint formula is .

Midpoint of AB =      (Substitute )

Midpoint of  AB =                       (Simplify)

Midpoint of  AC =    (Substitute )

Midpoint of AC =                           (Simplify)

Midpoint of  AB = , Midpoint of  AC = .

Midpoint of  AB = , Midpoint of  AC = .