Assertion: tetrahedron | /r/HasAspect | no polyhedron diagonals
Facets:
value: like a triangle in two dimensions
type: OTHER
Source sentences:
text: It is also the only simple polyhedron that has no polyhedron diagonals (i.e. no face diagonals or space diagonals).
text: It is the only convex polyhedron in which the straight line between any two vertices is always an edge (mathematically, that means that the tetrahedron has no polyhedron diagonals, just like a triangle in two dimensions).