Lesson 3-1: Same-Side Exterior Angles


Lines AB and FC are parallel. Line BC is a transversal of the two parallel lines AB and FC.


Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and activated. (click here to install Java now)

Created with GeoGebra by Barbara Perez, 2006

Directions !


1. Use points A, B, and C to move the lines. Observe the angle values.

2. ∠ABE and ∠FCG are same-side Exterior anlges. Name another pair of same-side Exterior angles.

3. Compare different pairs of same-side Exterior angles. What do you notice?

4. Prove your conjecture from question 3.