-1/NB -1i/NB +1/-1 +1/NA +1i/NA ANB Ar-tGo-Gn H-Angle ML-NL ML-NSL N angle N-Sp' N-Sp'/Sp'-Gn NL/NSL Pg/NB SN-Ba SNA SNB SNPg Sp'-Gn -1 - NB (calculated)