This document discusses translations, glide reflections, and compositions of transformations in a plane. It defines translations as transformations that move a figure without changing its size, angles, or orientation. Glide reflections are performed by first translating and then reflecting a figure. Compositions involve combining two or more transformations, like rotating and then reflecting a figure, with the order of operations changing the final result. Vectors are introduced as a way to represent translations by their horizontal and vertical components. Examples demonstrate identifying and performing translations, glide reflections, and compositions on geometric figures.