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Same-Side Exterior Angles

Author:
GeoGebra Materials Team
Topic:
Angles
Lines AB and FC are parallel. Line BC is a transversal.
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. What is always true about same-side exterior angles formed when parallel lines are cut by a transversal? 4. Prove your conjecture from question 3.

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