Magic tetrahedron gate

About this model

The TetraBox – An Impossible Geometry Puzzle Can you put the tetrahedron inside the box? You are given a box, a tetrahedron, and a sliding plate. Both the top of the box and the plate have triangular openings. Insert the plate through the box and find the correct position and orientation that allows the entire tetrahedron to pass through the openings and end up inside the closed box . It looks impossible: the openings appear too small for the tetrahedron. But no force, bending, or disassembly is required. The solution is entirely geometric. The solution looks like Magic!