%0 Journal Article %T From teaching experience. XIV. On the variety of tetrahedrons %A Voytehovskiy, Y.L. %K tetrahedron, simple form, combinatorial geometric kind, combination of simple forms, symmetry point group %J Vestnik of geosciences %D 2024 %N 0 %P 3 %I FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"