The minimum number of rigid transformations required to show that polygon abcde is congruent to polygon fghij is 1 2 3 4 . a rotation reflection dilation translation must be used to make the two polygons coincide. a sequence of transformations of polygon abcde such that abcde does not coincide with polygon fghij is a reflection across the x-axis and a 90° clockwise rotation about point d a translation 2 units down and a 90° counterclockwise rotation about point d a 90° counterclockwise rotation about point d and a reflection across the x-axis a reflection across the x-axis and a 90° counterclockwise rotation about point d