Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Disciplines (hierarchy name)
4. disciplines (concept)
5. [science and related disciplines]
6. science (modern discipline)
7. mathematics

Anotations

Scope note:

Branch of mathematics dealing with the relations holding among the sides and angles of triangles and among closely related magnitudes, especially with methods of deducing from given parts other required parts.