RT Book, Section T1 Fórmulas trigonométricas para poliedros esféricos e hiperbólicos A1 Díaz Sánchez, Raquel AB The Gram matrix of a spherical or hyperbolic polyhedron uniquely determines it and contains all the information about the dihedral angles. In this note we present formulae for the edge lenghts, heights and planar angles of the polyhedron in term of its Gram matrix. We also do the same in terms of the lenght matrix. PB UCM SN 978-84-695-4421-1 YR 2012 FD 2012 LK https://hdl.handle.net/20.500.14352/45362 UL https://hdl.handle.net/20.500.14352/45362 LA spa NO Universidad Complutense de Madrid DS Docta Complutense RD 14 jun 2026