Assertion: octahedron's triangle | /r/CapableOf | count mirror
Facets:
value: at each vertex
type: LOCATION
Source sentences:
text: The octahedral symmetry is represented by a fundamental triangle (4 3 2) counting the mirrors at each vertex.
text: The icosahedral symmetry is represented by a fundamental triangle (5 3 2) counting the mirrors at each vertex.
text: The dihedral symmetry is represented by a fundamental triangle (p 2 2) counting the mirrors at each vertex.