Card printout, scissors, tape or glue
Curriculum Topics Covered
Nets of 3D shapes and construction; estimation; 3D spatial thinking; properties of 3D shapes
If you build these two nets into an open-topped cube and a closed tetrahedron, can you place the tetrahedron inside the cube (without breaking either!)?
The sizes of the cube and tetrahedron have been carefully chosen so this is a more challenging puzzle than it might first appear…