A pink pyramid in two halves sitting on a black and blue exhbition table.

Two blocks form a triangular-based pyramid.

How it works

Arrange two identical pieces so they form a solid triangular-based pyramid with four faces (a tetrahedron).

Things to try or ask around the exhibit

What does the final tetrahedron shape remind you of?


A solid shape with four faces (flat sides) is called a tetrahedron. A tetrahedron has four vertices (or corners) and six edges. Each face is a triangle. Some frozen drinks are packaged in ‘Tetra Paks’, which are actually tetrahedron-shaped.