Assertion: icosahedron's vertex | /r/HasProperty | shared by three or five faces
Facets:
Source sentences:
text: In addition to the 2-fold axes orthogonal to the faces, there are also 3-fold and 5-fold axes passing through the vertices shared by three or five faces, respectively; besides, pairs of orthogonal planes, parallel to the diagonal of the rhombic faces, cross one another in correspondence of the 2-fold axes.