A line that crosses two or more lines
Transversal
When the slopes of two lines are the same
Parallel
Slope intercept form
y=mx+b
Point slope form
y-y^1= m(x-x^1)
Angles formed when two straight lines cross
Vertical angles
Angles in a similar location on two parallel lines
Corresponding Angles
Interior angles on opposite sides of the transversals
Alternate Interior angles
Exterior Angles on opposite sides of the transversal
Alternate Exterior angles
When the slopes of two lines are opposite reciprocals
Perpendicular
Interior angles on the same side of the traversal
Same-side Interior angles