The lines are perpendicular.

The lines are parallel.

The lines intersect.

8.5 inches

17.5 inches

1.4 inches

$\angle A\ and\ \ \angle D$

$\angle B\ and\ \angle D$

$\angle A\ and\ \angle F$

$\angle C\ and\ \angle F$

$\angle B\ and\ \angle E$

 $\overline{AB}\ and\ \overline{EF}$ 

 $\overline{BC}\ and\ \overline{EF}$ 

 $\overline{BC}\ and\ \overline{DE}$ 

 $\overline{AB}\ and\ \overline{DE}$ 

 $\overline{CA}\ and\ \overline{FD}$