Properties of Parallel Lines
Lines AB and FC are parallel. Line BC is a transversal of the two parallel lines AB and FC.
Properties of Parallel Lines
Use points A, B, and C to change the angle values. When a transversal intersects two parallel lines, what angle relationships are formed? Make as many observations as you can.
Angles Formed by Parallel Lines and a Transversal
This applet shows the relationships between angles formed by a pair of parallel lines and a transversal.