Math Dictionary / Parallel Lines
Parallel Lines
Parallel lines are lines in the same plane that never intersect.
GeometryGrade 4Grade 5Grade 6Grade 7Grade 8GEDSATACT
What it means
They stay the same distance apart.
Also called: same-direction lines
Examples
| Railroad tracks can model parallel lines |
| Horizontal lines y = 2 and y = 5 are parallel |
| Parallel lines have the same slope |
Common mistake
Lines that look close to parallel must have the same direction and never meet.
Try one
Question: Do parallel lines intersect?
Show answer
No.