Rolling a Tetrahedron over a Deltahedron
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The tetrahedron rolls over the deltahedron, with net and labyrinth shown. In doing so, it leaves a trace of the lower boundary surface. Mark the tracks along the path from the black dot to the gray dot. The tetrahedron is placed with face 4 on the black dot. The trace after the first rollover is also shown.
Contributed by: Izidor Hafner (January 2024)
Open content licensed under CC BY-NC-SA
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