Assertion: tetrahedron's face | /r/HasProperty | identical
Facets:
Source sentences:
text: In other words, all sides are equal, the angles are the same and the faces are identical.
text: Each face is an identical triangle, each side is equal, and the angles are the same.
text: This also shows that if each face is an identical right triangle, the volume is zero, as it must be, since four such triangles connected by their edges to give a tetrahedron necessarily all lie flat in the same plane:
text: Thus there are only three independent edge lengths, and each face of the tetrahedron is identical.