Assertion: tetrahedron's area | /r/HasProperty | denoted by sa
Facets:
value: opposite to vertex b
type: LOCATION
value: opposite to vertex a
type: LOCATION
value: opposite to vertex
type: OTHER
value: for triangle bcd
type: TRANSITIVE-OBJECT
Source sentences:
text: The areas of triangular faces may be denoted by Sa for triangle BCD opposite to vertex A, by Sb for triangle CDA opposite to vertex B, by Sc for triangle DAB opposite to vertex C and by Sd for triangle ABC opposite to vertex D.