Interior and Exterior Angles

The two lines IK and JL are parallel. Notice that line GH creates a series of interior and exterior angles. 1. Move point C to a different location. 2. Measure all the interior and exterior angles you create. 3. Record what you notice about the angles. 4. Repeat steps 1-3 two more times. 5. Overall what generalizations can you make about interior and exterior angles created by parallel lines?