In the diagram below ABCD is mapped onto JKLM after a rotation.

angle A = angle J      86

         B=K                 105

         D = M                44                

         C = L 

86 + 105 + 44 = 235^o     All of the angles (of a quadrilateral)  must sum to 360    360 - 235 = 125^o  = C = L