GEOMETRIAE DEDICATA, vol.120, no.1, pp.49-58, 2006 (SCI-Expanded)
For an n-simplex in H-n or S-n, we give sine theorems and their results for kth-order vertex angles which are defined in this paper. The Gram and edge matrices, and polar simplex of n-simplex in H-n or S-n are used to prove the theorems and their results.