Stage: 3 Challenge Level: 
| Triangles are formed by joining the vertices of a skeletal
cube.
How many different types of triangle are there? How many triangles altogether? |
 |
Visualising. Interactivities. Mixed triangles. Cubes. Squares. Working systematically. smartphone. Generalising. Mathematical reasoning & proof. Compound transformations.
Published March 2002.
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