Composite of Two Reflections over Parallel Lines

Explore what happens when you reflect twice.
[b]Directions: [/b][br]1. Click "Show Reflection #1", then "Show Reflection #2".[br]2. Play around with the points on the lines of reflection (Mirror) by clicking and dragging.[br]3. Uncheck "Show Reflection #1".[br]4. Continue to move the points around to make observations about the pre-image and the final-image shown.[br]5. Answer the questions below.
1.
What do you notice about the pre-image and the final image (Reflection #2)?
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Information: Composite of Two Reflections over Parallel Lines