CK-12 Foundation
Ck 12: Algebra: Comparing Equations of Parallel and Perpendicular Lines
Use their slopes to determine if two lines are parallel or perpendicular.
CK-12 Foundation
Ck 12: Algebra: Comparing Equations of Parallel and Perpendicular Lines
[Free Registration/Login may be required to access all resource tools.] Use their slopes to determine if two lines are parallel or perpendicular.