Assertion: tetrahedron's angle | /r/CapableOf | provide the position of the vertex
Facets:
value: in the $xz$ plane
type: LOCATION
Source sentences:
text: This allows you to easily calculate the internal angle of the tetrahedron (i.e., the angle between the lines from the center to any two vertices), and that internal angle provides the position of the vertex in the $xz$ plane.