Google Classroom
GeoGebraGeoGebra Classroom

Reflection2_Construct

Instructions for Construction

  1. Create point A (Toolbar Imagebut it has an A not a Z)
  2. Create line BC. (Toolbar Image)
  3. Reflect A across line BC (Toolbar Image, then click Point A and then click line BC).
  4. Create a segment between A and A' (Toolbar Image then Toolbar Image then click on points A and A').
  5. Label the intersection of segment AA' and line BC (Toolbar Image then Toolbar Image then click on the segment and and the line).
  6. Move Point A around. What do you notice about A, A', and line BC?
  7. Use the measures buttons to confirm your conjectures.
  • To measure a segment, choose Toolbar Imagethen Toolbar Image then click on both endpoints of the segment).
  • To measure an angle, click Toolbar Image then three points.