| A | B |
|---|
| Parallel Lines | two lines in a plane that never meet |
| skew lines | two lines that do not intersect and are not in the same plane |
| transversal | a line that intersects two or more lines in a plane at different points |
| corresponding angles | two angles formed by a transversal that appear to be in the same position of different lines |
| slope | the steepness of a line, m =(y2-y1)/(x2-x1) |
| perpendicular lines | two lines whose slopes are opposite reciprocals and whose product is -1 |
| equidistant | the distance between two lines measured along a perpendicular lines is always the same |
| alternate interior angles | Interior angles formed by two lines cut by a transveral that lie on opposite sides of the transversal |
| alternate exterior angles | Exterior angles formed by two lines cut by a transveral that lie on opposite sides of the transversal |
| Consecutive Interior Angles | Interior Angles that lie on the same side of the transversal whose sum is 180. |
