The name of the relationship between ∠1 and ∠4 is alternate interior angles. Alternate interior angles are a pair of congruent angles formed by two parallel lines and a transversal line.
The name of the relationship between ∠1 and ∠4 is alternate interior angles.
Alternate interior angles are a pair of angles formed by two parallel lines and a transversal line.
These angles are located on opposite sides of the transversal and are congruent (equal) to each other.
In this case, ∠1 and ∠4 are alternate interior angles because they are both inside the parallel lines and on opposite sides of the transversal.