This document discusses reflections in geometry. It begins with essential questions about reflections and how they differ from translations. It then discusses properties of reflections, including that lines are taken to lines of the same length and angles are taken to angles of the same measure. It provides examples of reflecting objects across different lines of reflection, including non-standard lines like y=3 and x=-2. It includes an example of two students, Antonio and Brittany, where Brittany tries to mirror Antonio's movements on a coordinate plane.