Alternating Interior Angles

Author:
janetvmiller_1
Topic:
Angles, Geometry
Move the point C (keeping it on the right side of point A) to watch the alternating interior angles. Move the point C to the left side of point A to watch same side interior angles.
GeoGebra Applet
What do you notice about the alternating interior angles? What do you notice about the same side interior angles?

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