Assertion: icosahedron's projection | /r/HasProperty | special orthogonal
Facets:
Source sentences:
text: The icosahedron has three special orthogonal projections, centered on a face, an edge and a vertex:
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.
text: The truncated icosahedron has five special orthogonal projections, centered, on a vertex, on two types of edges, and two types of faces: hexagonal and pentagonal.