1.1: Language and Notation
In this section, we discuss the vocabulary you need to know to understand geometry. You should be comfortable with the meaning of the words used in geometry so you can use its language to understand and solve geometry problems.
Watch this video. Make sure you understand the definitions for line, line segment, ray, midpoint, collinear, and planar.
This video discusses the differences between geometric objects that may appear to be similar: lines, line segments, and rays.