| A | B |
|---|
| line | a straight path that goes on forever in both directions |
| ray | part of a line having only one endpoint |
| angle | two rays having the same endpoint |
| paralllel lines | lines that never cross even if they are extended |
| intersecting lines | lines that cross each other at a point |
| perpendicular lines | lines that form square corners where they cross |
| endpoint | a point at the end of a ray |
| vertex | the pont that two rays of an angle have in common |
