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.

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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.