Assertion: heptagon's triangle | /r/HasProperty | bounded by great-circle arcs
Facets:
value: on the surface of a sphere
type: LOCATION
Source sentences:
text: This spherical triangle is one of the Schwarz triangles (with parameters 3/2, 3/2, 3/2), triangles bounded by great-circle arcs on the surface of a sphere that can tile the sphere by reflection.