Assertion: icosahedron's projection | /r/HasProperty | centered on two types of edges
Facets:
Source sentences:
text: The triakis icosahedron has three symmetry positions, two on vertices, and one on a midedge: The Triakis icosahedron has five special orthogonal projections, centered on a vertex, on two types of edges, and two types of faces: hexagonal and pentagonal.