Question

which angle is congruent to ∠1? ∠6 ∠2 ∠3 ∠4

Explanation:

Step1: Recall the definition of vertical angles

Vertical angles are formed when two lines intersect. They are opposite each other and are congruent.

Step2: Identify the vertical angle of ∠1

Looking at the diagram, ∠1 and ∠3 are vertical angles.

Answer:

∠3