This document provides an overview of angles and their definitions in geometry. It defines a ray as a line segment extending from an endpoint in one direction forever, and an angle as the figure formed by two rays sharing a common endpoint, called the vertex. Angles are classified as acute, right, or obtuse depending on whether they measure less than, equal to, or greater than 90 degrees. The document presents different naming conventions for angles based on identifying the vertex point or using numerical designations to avoid confusion when multiple angles share a vertex. It concludes by providing a link to an online game about identifying angles.