Vertical Angles Conjecture


Vertical angles are non-adjacent angles formed by a pair of intersecting lines. You can think of them as the opposite angles that appear in the "bow-tie" formed when two lines intersect.

The precise statement of the conjecture is:

Conjecture (Vertical Angle Conjecture ): If two angles are vertical, then they are equal in measure.

Interactive Sketch Pad Demonstration:

Linked Activity:

Please feel free to try the activity sheet associated with this conjecture.

Next: Linear Pairs Conjecture
Back: Conjectures in Geometry Conjecture List or to the Introduction.