Vertical Angles
- Author:
- Josh Estill, GeoGebra Materials Team
- Topic:
- Angles
Vertical angles are formed by intersecting lines. <AED and <CEB are vertical angles. <AEC and <DEB are vertical angles.
Use points A, B, C, and D to change the angle values. Make a conjecture about the angle measures of a pair of vertical angles.
What type of lines must intersect to make vertical angles?
What is the relationship between a red angle and a blue angle?