The Vertical Angle Theorem states the following.
If two lines AB and KL intersect at X to form angles, then the vertical angles ZAXK and ZBXL are congruent, by the Vertical Angle Theorem.
The hypothesis of the Vertical Angle Theorem is?
1. “two lines AB and KL intersect at X to form angles”
2. “vertical angles
3. “by the vertical angle theorem”