More than normal posterior angle indicate:

Rakosi- Jarabak analysis The sum of  posterior angles i.e. the cranial base (N–S–Ar), articular (S–Ar–Go), and gonial angles (Ar–Go–Me)> 396 degrees indicates clockwise direction of growth i.e. vertical growth. The sum of  posterior angles i.e. the cranial base (N–S–Ar), articular (S–Ar–Go), and gonial angles (Ar–Go–Me)< 396 degrees indicates anticlockwise direction of growth i.e. horizontal growth.