Question

1. multiple - choice 7 points. identify the reason that justifies the following statement. “if then, ∠1≅∠2”. vertical angles theorem. angle addition postulate. definition of congruence. linear pair theorem.

Explanation:

Vertical angles are formed when two lines intersect. In the given statement, ∠1 and ∠2 are vertical angles. The vertical - angles theorem states that vertical angles are congruent.

Answer:

Vertical angles theorem