GE.A.1Points, lines, planes01/04
Points, lines, planes, segments, and rays.
Step01of 04
Geometry's vocabulary — five undefined or basic figures that everything else builds on.
| Point | →a location, no size — labeled with a capital letter (A) |
| Line | →extends infinitely in both directions — named by 2 points or a script letter |
| Plane | →flat surface extending infinitely in all directions — named by 3 non-collinear points |
| Segment | →part of a line BETWEEN two endpoints — finite length |
| Ray | →part of a line starting at one endpoint, extending infinitely the other way |