how can you describe the transformation? slide flip turn

Brief Explanations:

A slide (translation) moves a shape without rotating or flipping it. The orientation of shape A and shape B is the same, just shifted horizontally. A flip (reflection) would create a mirror - image, and a turn (rotation) would change the orientation of the shape. Since the orientation is unchanged and there is no mirror - image, it is a slide.

Answer:

Slide