Whitney and Ciara's Geometry Outside
- 3. Line- straight path of points that goes on forever in two directions. A symbol for a line. S
- 4. Plane-An endless flat surface A symbol for a plane.
- 6. Ray- part of a line which has one endpoint and goes on in one direction forever. A symbol for a ray.
- 8. Intersecting lines- lines that pass through the same point. Symbol for intersecting lines.
- 9. Perpendicular lines- intersecting lines that form square corners. Symbol for a perpendicular lines.