# Parallel Lines Cut by a Transversal

- Author:
- Sean Foster

- Topic:
- Geometry

## Directions

In the picture above Lines AB and CD are parallel to each other. Transversal c intersects them both.
Use the check boxes to have certain angle relationships appear. Move Point E to change the measures of the angles. As you check and un-check the boxes and move point E around pay attention to:
1. What do you notice about the measures of Corresponding Angles?
2. What do you notice about the measures of Alternate Exterior Angles?
3. What do you notice about the measures of Alternate Interior Angles?
4. What do you notice about the measures of Same-Side Interior Angles?