Point
A location in any space represented by a dot. Always capitalized
Line
Defined by two points. Extends info tally in both directions. Can be marked with 1 lowercase letter or 2 capitalized ones
Plane
Extends infinitely in 2 directions. 3 points in the plane that are not in the same line
Segment
Connects two points
Ray
A line with a single endpoint that extends infinitely in any direction
Opposite Rays
Two rays that have the same end point and extend in opposite directions