Assertion: orthogonal tetrahedron | /r/UsedFor | refer to second example
Facets:
Source sentences:
text: The term 'orthogonal tetrahedron' refers to the second example, mentioned in JB's answer above: a slice cut off a corner of a cubic block, or, otherwise, orthogonal (right) tetrahedron has one of its 4 trihedral angles formed by three 2 by 2 perpendicular edges, or, equivalently, 3 of its 4 faces are right triangles, joined to a common vertex by their right angles