Kathryn draws three pairs of intersecting lines. In each figure, she measures a pair of vertical angles.
What is a reasonable conjecture for Kathryn to make by recognizing a pattern and using inductive reasoning?
When a pair of lines intersect, the vertical angles are congruent.
When a pair of lines intersect, the vertical angles are acute.
When a pair of lines intersect, all of the angles formed are right angles.
When a pair of lines intersect, all of the angles formed are congruent.
