Move points A, B, and C to change the shape of the triangle. Move points P and Q to move the line of reflection. Click the boxes to show segment lengths and AA', BB' and CC'.
Select the boxes for AA', BB' and CC'. What do you about the slope of these lines and the line of reflection, PQ?
Select the box for Lengths. What do you notice? What is the relationship between the line of reflection and AA', BB' and CC'?
Move point P to point A. How does this affect A'?
What is true about the line of reflection and line segments AA', BB' and CC'?
Write a precise definition for a rotation, using the following words or objects:
Which of the following are properties of the reflected triangle A'B'C'?