Copy of Finding the Line of Reflection
Discover the construction to find the line of reflection
1. Use the Reflection over a Line tool to reflect ∆ABC over line DE.
What is the name of your new triangle?
2. Using the Segment tool,
connect A and A' to create _______
connect B and B' to create _______
connect C and C' to create _______
3. Use the slope tool (click fifth box from the right) to measure the slope of segment AA', BB' and CC'
What do you notice about these lines?
Then, ________ ∥ _________ ∥ _________
4. Click on the intersection of line DE and line AA', BB' and CC'. Measure the angle formed by line DE and segments AA', BB' and CC'
5. Write a hypothesis:
Line RS is the _____________________________________________ of line segment AA'
Line RS is the _____________________________________________ of line segment BB^'
Line RS is the _____________________________________________ of line segment CC^'
What Geogebra tool could you use to check if your hypothesis is correct?