Assertion: icosahedron's projection | /r/HasProperty | centered on edge
Facets:
Source sentences:
text: The icosahedron has three special orthogonal projections, centered on a face, an edge and a vertex:
text: The cuboctahedron has four special orthogonal projections, centered on a vertex, an edge, and the two types of faces, triangular and square.
text: The octahedron has four special orthogonal projections, centered, on an edge, vertex, face, and normal to a face.