Stage: 1 Challenge Level: 
Move four sticks so there are exactly four triangles.
Interactivities. Visualising. Games. Working systematically. Matchsticks. Tangram. Practical Activity. Compound transformations. Equilateral triangles. Investigations.
Published September 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
