What is the surface area of the tetrahedron with one vertex at O
the vertex of a unit cube and the other vertices at the centres of
the faces of the cube not containing O?
Age 16 to 18 Challenge Level:
Iterative methods or the visual interpretation of graphical solutions are worth exploring. There is lots of room for different approaches, including practical ones, or partly practical and partly analytical.
The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the
NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to
embed rich mathematical tasks into everyday classroom practice.