Stage: 5 Challenge Level: 
If you draw copies of the table reflected in the cushions then the reflection of the path of the ball after hitting a cushion appears as a straight line in the image of the table.
Interactivities. Stage 5 needs dealing with. Reflections. biology. Dynamic geometry. Calculus generally. engineering. Mathematical modelling. Coordinates. Real world.
Published March 2000.
Copyright © 2007. University of Cambridge. All rights reserved.
NRICH is part of the family of activities in the Millennium Mathematics Project, which also includes the Plus and Motivate sites.
email: nrich@damtp.cam.ac.uk