IMO Shortlist 1969 problem 12
Dodao/la:
arhiva2. travnja 2012. Given a unit cube, find the locus of the centroids of all tetrahedra whose vertices lie on the sides of the cube.
%V0
$(CZS 1)$ Given a unit cube, find the locus of the centroids of all tetrahedra whose vertices lie on the sides of the cube.
Izvor: Međunarodna matematička olimpijada, shortlist 1969