Math
Proving lines parallel.
Definition
Methods to prove two lines are parallel using angle relationships formed by a transversal. If corresponding angles are equal, alternate interior angles are equal, or co-interior angles are supplementary, the lines are parallel.
Examples
Real-world.
- 1 If alternate interior angles measure 55° each, the lines are parallel
- 2 If corresponding angles are both 110°, the lines are parallel
- 3 If co-interior (same-side interior) angles sum to 180°, the lines are parallel