In a glide reflection, what is the first transformation performed?

In a glide reflection, the first transformation performed is a reflection. This transformation involves flipping a figure over a line, which serves as the axis of reflection. After this initial reflection, a translation occurs, moving the reflected image along the direction parallel to the axis of reflection.

The sequence of transformations is fundamental to defining glide reflections in a geometric context. By conducting a reflection first, the original shape is mirrored across a specified line, setting the stage for the subsequent translation. This two-step process creates a unique type of symmetry that is characteristic of glide reflections, enabling one to visualize and understand how the transformation alters the position and orientation of the object in space.