| A | B |
|---|
| point | an exact location in space |
| line | a straight path of points that goes on and on in two directions |
| line segment | a part of a line with two endpoints |
| ray | a part of a line that has one end point and continues on and on in only one driection |
| angle | is formed by two rays that have the same endpoint |
| vertex | the common endpoint of two rays that form an angle |
| right angle | a square corner, 90 degrees |
| acute angle | an angle less than a right angle |
| obtuse angle | an angle more than a right angle |
| parallel lines | lines that never intersect |
| intersecting lines | lines that pass through the same point |
| perpendicular lines | lines that form right angles |
