## Three Lines

## Three lines can be:

1) Parallel (this means they have the same slope and never cross)

2) Intersecting at different points

(this means they have different slopes and eventually form a triangle)

3) Perpendicular

(technically this is a subset of intersecting lines with the idea that their slopes are opposite and reciprocal, or you are dealing with vertical and horizontal lines)

4) Intersecting at a common point of concurrency (again another special case of intersecting)

5) Intersecting with parallel lines and a single transversal line

(special angles with special properties are created)

## Two Parallel Lines cut by a Transversal |