Name the directed line segments using vector addition, using A, B, C, D, E, F as vertices.

Here's how to name the directed line segments using vector addition:

Let's label the vertices for clarity:
Let the bottom-left vertex be A.
Let the top-left vertex be B.
Let the top-middle vertex be C.
Let the bottom-middle vertex be D.
Let the top-right vertex be E.
Let the bottom-right vertex be F.

Based on the arrows in the figure, the directed line segments are:
$a = \vec{AB}$
$b = \vec{BC}$
$c = \vec{AC}$
$d = \vec{AD}$
$e = \vec{DC}$
$f = \vec{DF}$
$g = \vec{CE}$

We