Answer:
Two perpendicular lines
Step-by-step explanation:
The notation [tex]\sf \overleftrightarrow{AB} \perp \overleftrightarrow{DC}[/tex] indicates that line segment [tex]\sf AB[/tex] is perpendicular to line segment [tex]\sf DC[/tex].
Here are the explanations for the options:
Two congruent lines:
Congruent lines are lines that have the same length and are parallel to each other. The notation given does not imply that the lines are congruent but rather that they are perpendicular to each other.
Two perpendicular segments:
This could be a correct interpretation, but the notation specifically refers to lines [tex]\sf ( \overleftrightarrow{AB}[/tex] and [tex]\sf \overleftrightarrow{DC})[/tex], not segments. However, if [tex]\sf AB[/tex] and [tex]\sf DC[/tex] were line segments, this notation would mean that they are perpendicular.
Two perpendicular lines:
This is the correct interpretation based on the given notation. The notation [tex]\sf \overleftrightarrow{AB} \perp \overleftrightarrow{DC}[/tex] explicitly indicates that line [tex]\sf AB[/tex] is perpendicular to line [tex]\sf DC[/tex].
In summary, the notation [tex]\sf \overleftrightarrow{AB} \perp \overleftrightarrow{DC}[/tex] indicates that two lines, [tex]\sf AB[/tex] and [tex]\sf DC[/tex], are perpendicular to each other.
