- Joseph McLean
This provides an opportunity to explore reflection symmetry. You have a quadrilateral (DEFG) which has been reflected across line BC. You can change the shape of the quadrilateral and move the line and observe the relationships between the original shape, its image, and the line of symmetry.
The objectives here are simply to explore. What observations can you make about the relationships between the original quadrilateral, its image, and their relationships to the line of symmetry? Can you repeat this construction on GeoGebra? What tools were used? Go to your GeoGebra utility and try to replicate this construction.