Angle Class
  Three corner cycle in one level

 

Edges Moved Positive - the long arm is the 'arrowpeak'EMTp2R²dMU²M'dr²

Edges Moved Negative - the long arm is the 'arrowpeak'EMm4R²d'M'U²Md'r²

moving 3 edges triangel positive2L moving 3 edges positive ER²E'R²u'

moving 3 edges triangel negative2L moving 3 edges negative ER²ER²u