TOT 012 1981 Spring S1 8 tetrahedra touch each other by faces
Source:
August 17, 2019
tetrahedron3D geometrygeometry
Problem Statement
We will say that two pyramids touch each other by faces if they have no common interior points and if the intersection of a face of one of them with a face of the other is either a triangle or a polygon. Is it possible to place tetrahedra in such a way that every two of them touch each other by faces?(A Andjans, Riga)