Assertion: tetrahedron's face | /r/HasProperty | reflection
Facets:
Source sentences:
text: ,  , (332) is isomorphic to alternating group, (the identity and 11 proper rotations) with the following conjugacy classes (in parentheses are given the permutations of the vertices, or correspondingly, the faces, and the unit quaternion representation): reflections in a plane perpendicular to an edge: 6