# 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. Select the Parallel Line tool. Select line segment AA'. Move the new parallel line to line segment BB' Is line segment BB' ∥ line segment AA'?_______ Move the new parallel line to line segment CC' Is line segment CC' ∥ line segment AA'? _______ Then, ________ ∥ _________ ∥ _________ 4. 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? Write steps to find the line of reflection on paper using a compass