prove that the group of symmetry's of tetrahedron in $R^{3}$ Isomorphic to $S_4$.

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prove that the group of symmetry's of tetrahedron in $R^{3}$ Isomorphic to $S_4$.

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Hint: Show that an isometry of the tetrahedron must permute the vertices of the tetrahedron. Show that every permutation of the vertices of a tetrahedron induces exactly one isometry.

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You may want to use the fact that $S_{4}$ is generated by $(1,2)$ and $(2,3,4)$. Now find two symmetries that induce those two permutations on the vertices.