Question

what does the notation below indicate? ∠abc ≅ ∠def two parallel lines two congruent angles two congruent segments

Explanation:

In geometry, the symbol $\cong$ is used to denote congruence. $\angle ABC$ and $\angle DEF$ represent angles. So, $\angle ABC\cong\angle DEF$ means the two angles have the same measure.

Answer:

two congruent angles