Posted by clavin on .
Triangle ABC has an obtuse angle at
B, base
BC has
length equal to 30 and height equal to
24.
D is a point on
the line segment BC and
E is a point on AC such that DE∥AB. F is a point on AB such that FD∥AC. As D
varies within line segment BC, what is the maximum value of area of triangle DEF?

heeeeeeeeeeelp math 
TOM,
90