Lesson 1 Notes
A point gives an exact location. It has no length, width, or thickness. We represent it with a dot.
We call this "point P."
A line consists of all the points that extend infinitely in two opposite directions. It has no width or thickness but infinite length.
We call this "line MN" or "line l."
A ray is part of a line that contains one endpoint and all the points extending in one direction from the endpoint.
We call this "ray MN."
A segment consists of two endpoints on a line and all the points between the endpoints.
We call this "segment MN."
A plane consists of all points on a flat surface. It goes on forever all directions in two-dimensions.
For other definitions, click here.