3-8 Equations of Parallel and Perpendicular Lines Flashcards
1
Q
standard formula
A
Ax+ By=C
2
Q
slope of parallel lines
A
two lines not vertical are parallel if and only if the lines’ slopes are equal
3
Q
slope of perp. lines
A
two lines not vertical are perpendicular if and only if the lines slopes have a product of -1.
