Question

angle 4 and angle 1 are.... add up to 90 degrees add up to 360 degrees congruent add up to 180 degrees

Explanation:

Step1: Recall angle - pair relationships

When two lines are intersected by a transversal, angle 4 and angle 1 are vertical angles.

Step2: Apply vertical - angle property

Vertical angles are congruent, i.e., they have the same measure.

Answer:

Congruent