Assertion: octahedron's vertex | /r/HasProperty | corner
Facets:
Source sentences:
text: The faces are congruent, regular polygons with the same number of faces meeting at each vertex (corner).
text: the same number of polygons meet at each vertex (corner)
text: A vertex is a corner.
text: Two interesting things about any Platonic solid: all sides have the same shape and each vertex (corner)