This document defines and describes different types of lines and angles in geometry. It begins by defining a line, line segment, and ray. It then discusses intersecting and non-intersecting lines, as well as parallel and perpendicular lines. The document defines an angle as the figure formed by two rays sharing an endpoint. It proceeds to describe different types of angles such as acute, obtuse, right, straight, and reflex angles. Adjacent, linear pairs of, complementary, and supplementary angles are also defined. Examples are provided to illustrate each term.