Question

what does the following notation describe?
\\(\overline{ab} \cong \overline{dc}\\)
two perpendicular segments
two congruent segments
two congruent lines

Explanation:

The notation $\overline{AB} \cong \overline{DC}$ uses the congruence symbol ($\cong$) and the segment notation (with the overline). In geometry, the overline on $AB$ and $DC$ indicates line segments, and the congruence symbol means they have the same length (are congruent). "Two perpendicular segments" would use a perpendicular symbol ($\perp$), and lines (without endpoints) are not denoted with overlines like segments. So this notation describes two congruent segments.

Answer:

B. two congruent segments